{"id":2963046,"date":"2026-05-27T07:01:33","date_gmt":"2026-05-27T14:01:33","guid":{"rendered":"https:\/\/www.esri.com\/arcgis-blog\/?post_type=blog&#038;p=2963046"},"modified":"2026-05-27T07:13:19","modified_gmt":"2026-05-27T14:13:19","slug":"append-field-map-arcgis-pro","status":"publish","type":"blog","link":"https:\/\/www.esri.com\/arcgis-blog\/products\/arcgis-pro\/analytics\/append-field-map-arcgis-pro","title":{"rendered":"Simplified field mapping when loading data with Append in ArcGIS Pro (May 2026)"},"author":314022,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"open","ping_status":"closed","template":"","format":"standard","meta":{"_acf_changed":false,"_searchwp_excluded":""},"categories":[23341,37101,23851],"tags":[757971,42181,781000,24321,773052],"industry":[],"product":[36561],"class_list":["post-2963046","blog","type-blog","status-publish","format-standard","hentry","category-analytics","category-announcements","category-data-management","tag-append","tag-arcgis-pro","tag-arcgis-pro-3-7","tag-geoprocessing","tag-geoprocessing-tools","product-arcgis-pro"],"acf":{"short_description":"In ArcGIS Pro 3.7, the Append tool has an updated field map parameter for a simplified field matching experience. ","flexible_content":[{"acf_fc_layout":"content","content":"<p><span style=\"color: #2f5496\"><strong>Approximate Read Time:<\/strong><\/span> 6 min<\/p>\n<p>You can use the <a href=\"https:\/\/doc.esri.com\/en\/arcgis-pro\/latest\/tool-reference\/data-management\/append.html?tabs=dialog\" target=\"_blank\" rel=\"noopener\">Append<\/a> tool in ArcGIS Pro to load data from one or multiple input datasets into an existing target dataset.<\/p>\n"},{"acf_fc_layout":"image","image":{"ID":2963122,"id":2963122,"title":"Append_FM_Blog_Image_1","filename":"Append_FM_Blog_Image_1.png","filesize":399070,"url":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2026\/04\/Append_FM_Blog_Image_1.png","link":"https:\/\/www.esri.com\/arcgis-blog\/products\/arcgis-pro\/analytics\/append-field-map-arcgis-pro\/append_fm_blog_image_1","alt":"The Append tool in ArcGIS Pro","author":"314022","description":"","caption":"The Append tool in ArcGIS Pro","name":"append_fm_blog_image_1","status":"inherit","uploaded_to":2963046,"date":"2026-04-17 21:29:15","modified":"2026-04-17 21:29:24","menu_order":0,"mime_type":"image\/png","type":"image","subtype":"png","icon":"https:\/\/www.esri.com\/arcgis-blog\/wp-includes\/images\/media\/default.png","width":792,"height":555,"sizes":{"thumbnail":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2026\/04\/Append_FM_Blog_Image_1-213x200.png","thumbnail-width":213,"thumbnail-height":200,"medium":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2026\/04\/Append_FM_Blog_Image_1.png","medium-width":372,"medium-height":261,"medium_large":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2026\/04\/Append_FM_Blog_Image_1.png","medium_large-width":768,"medium_large-height":538,"large":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2026\/04\/Append_FM_Blog_Image_1.png","large-width":792,"large-height":555,"1536x1536":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2026\/04\/Append_FM_Blog_Image_1.png","1536x1536-width":792,"1536x1536-height":555,"2048x2048":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2026\/04\/Append_FM_Blog_Image_1.png","2048x2048-width":792,"2048x2048-height":555,"card_image":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2026\/04\/Append_FM_Blog_Image_1-664x465.png","card_image-width":664,"card_image-height":465,"wide_image":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2026\/04\/Append_FM_Blog_Image_1.png","wide_image-width":792,"wide_image-height":555}},"image_position":"center","orientation":"horizontal","hyperlink":""},{"acf_fc_layout":"content","content":"<p>Combining multiple datasets into one may sound simple, but sometimes the input and target dataset attribute fields are different. For example, one dataset may have more fields than the other, or fields have different names or types. In this case, you may need to use <em>field mapping<\/em> to reconcile those differences.<\/p>\n"},{"acf_fc_layout":"image","image":{"ID":2963071,"id":2963071,"title":"gif_1_for_append_fm_blog","filename":"gif_1_for_append_fm_blog.gif","filesize":128598,"url":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2026\/04\/gif_1_for_append_fm_blog.gif","link":"https:\/\/www.esri.com\/arcgis-blog\/products\/arcgis-pro\/analytics\/append-field-map-arcgis-pro\/gif_1_for_append_fm_blog","alt":"Append tool Field mapping illustration","author":"314022","description":"","caption":"Field mapping with Append","name":"gif_1_for_append_fm_blog","status":"inherit","uploaded_to":2963046,"date":"2026-04-17 20:47:26","modified":"2026-04-17 20:47:44","menu_order":0,"mime_type":"image\/gif","type":"image","subtype":"gif","icon":"https:\/\/www.esri.com\/arcgis-blog\/wp-includes\/images\/media\/default.png","width":500,"height":300,"sizes":{"thumbnail":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2026\/04\/gif_1_for_append_fm_blog-213x200.gif","thumbnail-width":213,"thumbnail-height":200,"medium":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2026\/04\/gif_1_for_append_fm_blog.gif","medium-width":435,"medium-height":261,"medium_large":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2026\/04\/gif_1_for_append_fm_blog.gif","medium_large-width":500,"medium_large-height":300,"large":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2026\/04\/gif_1_for_append_fm_blog.gif","large-width":500,"large-height":300,"1536x1536":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2026\/04\/gif_1_for_append_fm_blog.gif","1536x1536-width":500,"1536x1536-height":300,"2048x2048":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2026\/04\/gif_1_for_append_fm_blog.gif","2048x2048-width":500,"2048x2048-height":300,"card_image":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2026\/04\/gif_1_for_append_fm_blog.gif","card_image-width":500,"card_image-height":300,"wide_image":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2026\/04\/gif_1_for_append_fm_blog.gif","wide_image-width":500,"wide_image-height":300}},"image_position":"center","orientation":"horizontal","hyperlink":""},{"acf_fc_layout":"content","content":"<p><a href=\"https:\/\/doc.esri.com\/en\/arcgis-pro\/latest\/help\/analysis\/geoprocessing\/basics\/field-map.html\" target=\"_blank\" rel=\"noopener\">Field mapping<\/a> can be as simple as matching fields between datasets, or more complex involving <strong>Actions<\/strong> to determine how multiple source fields get combined to a single target field. <strong>Actions<\/strong> can include statistical operations like finding the sum, mean, or max value, or text operations like concatenating or slicing field values.<\/p>\n<p><span style=\"color: #2f5496\"><strong>Note:<\/strong><\/span> In other tools (like <a href=\"https:\/\/doc.esri.com\/en\/arcgis-pro\/latest\/tool-reference\/data-management\/merge.html?tabs=dialog\" target=\"_blank\" rel=\"noopener\">Merge<\/a> and <a href=\"https:\/\/doc.esri.com\/en\/arcgis-pro\/latest\/tool-reference\/analysis\/spatial-join.html?tabs=dialog\" target=\"_blank\" rel=\"noopener\">Spatial Join<\/a>), field mapping also includes changing other field properties like names, alias, field order, as well as adding and removing output fields.<\/p>\n<h1><strong><span style=\"color: #2f5496\">Field mapping with Append<\/span><\/strong><\/h1>\n<p>In the Append tool, you can activate the field map parameter by specifying <code>Use the field map to reconcile field differences<\/code> as the <strong>Field Matching Type<\/strong>.<\/p>\n<p>The field map automatically maps fields with the same name. But in previous releases, it may not be immediately obvious how to map the unmatched fields (indicated with a warning).<\/p>\n"},{"acf_fc_layout":"image","image":{"ID":2963128,"id":2963128,"title":"Append_FM_Blog_Image_3","filename":"Append_FM_Blog_Image_3.png","filesize":11559,"url":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2026\/04\/Append_FM_Blog_Image_3.png","link":"https:\/\/www.esri.com\/arcgis-blog\/products\/arcgis-pro\/analytics\/append-field-map-arcgis-pro\/append_fm_blog_image_3","alt":"Append Field map in Pro 3.6 and earlier","author":"314022","description":"","caption":"Append field map parameter in ArcGIS Pro 3.6 and earlier","name":"append_fm_blog_image_3","status":"inherit","uploaded_to":2963046,"date":"2026-04-17 21:42:06","modified":"2026-04-17 21:43:26","menu_order":0,"mime_type":"image\/png","type":"image","subtype":"png","icon":"https:\/\/www.esri.com\/arcgis-blog\/wp-includes\/images\/media\/default.png","width":370,"height":230,"sizes":{"thumbnail":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2026\/04\/Append_FM_Blog_Image_3-213x200.png","thumbnail-width":213,"thumbnail-height":200,"medium":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2026\/04\/Append_FM_Blog_Image_3.png","medium-width":370,"medium-height":230,"medium_large":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2026\/04\/Append_FM_Blog_Image_3.png","medium_large-width":370,"medium_large-height":230,"large":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2026\/04\/Append_FM_Blog_Image_3.png","large-width":370,"large-height":230,"1536x1536":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2026\/04\/Append_FM_Blog_Image_3.png","1536x1536-width":370,"1536x1536-height":230,"2048x2048":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2026\/04\/Append_FM_Blog_Image_3.png","2048x2048-width":370,"2048x2048-height":230,"card_image":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2026\/04\/Append_FM_Blog_Image_3.png","card_image-width":370,"card_image-height":230,"wide_image":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2026\/04\/Append_FM_Blog_Image_3.png","wide_image-width":370,"wide_image-height":230}},"image_position":"center","orientation":"horizontal","hyperlink":""},{"acf_fc_layout":"content","content":"<h1><span style=\"color: #2f5496\"><strong>Field mapping with Append (Pro 3.7)<\/strong><\/span><\/h1>\n<p>In <a href=\"https:\/\/doc.esri.com\/en\/arcgis-pro\/3.7\/get-started\/whats-new-in-arcgis-pro.html#0B0\" target=\"_blank\" rel=\"noopener\"><strong>ArcGIS Pro 3.7<\/strong><\/a>, the field map parameter in the Append tool dialog box is updated to support more field mapping capabilities.<\/p>\n"},{"acf_fc_layout":"image","image":{"ID":2963129,"id":2963129,"title":"Append_FM_Blog_Image_4","filename":"Append_FM_Blog_Image_4.png","filesize":14135,"url":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2026\/04\/Append_FM_Blog_Image_4.png","link":"https:\/\/www.esri.com\/arcgis-blog\/products\/arcgis-pro\/analytics\/append-field-map-arcgis-pro\/append_fm_blog_image_4","alt":"Append field map in Pro 3.7","author":"314022","description":"","caption":"Append field map parameter in ArcGIS Pro 3.7","name":"append_fm_blog_image_4","status":"inherit","uploaded_to":2963046,"date":"2026-04-17 21:42:34","modified":"2026-04-17 21:42:55","menu_order":0,"mime_type":"image\/png","type":"image","subtype":"png","icon":"https:\/\/www.esri.com\/arcgis-blog\/wp-includes\/images\/media\/default.png","width":370,"height":254,"sizes":{"thumbnail":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2026\/04\/Append_FM_Blog_Image_4-213x200.png","thumbnail-width":213,"thumbnail-height":200,"medium":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2026\/04\/Append_FM_Blog_Image_4.png","medium-width":370,"medium-height":254,"medium_large":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2026\/04\/Append_FM_Blog_Image_4.png","medium_large-width":370,"medium_large-height":254,"large":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2026\/04\/Append_FM_Blog_Image_4.png","large-width":370,"large-height":254,"1536x1536":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2026\/04\/Append_FM_Blog_Image_4.png","1536x1536-width":370,"1536x1536-height":254,"2048x2048":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2026\/04\/Append_FM_Blog_Image_4.png","2048x2048-width":370,"2048x2048-height":254,"card_image":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2026\/04\/Append_FM_Blog_Image_4.png","card_image-width":370,"card_image-height":254,"wide_image":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2026\/04\/Append_FM_Blog_Image_4.png","wide_image-width":370,"wide_image-height":254}},"image_position":"center","orientation":"horizontal","hyperlink":""},{"acf_fc_layout":"content","content":"<p>The updated field map displays the <em>target fields<\/em> and <em>source fields<\/em> in two columns. Each <em>source field<\/em> includes the name of the input dataset it came from in parentheses, which is especially useful when you have more than one input. Using the drop-down, you can map<em> source fields<\/em> from the<strong> Input Datasets<\/strong> to <em>target fields<\/em> from the <strong>Target Dataset<\/strong> directly on the tool dialog box.<\/p>\n<h2><span style=\"color: #2f5496\"><strong>Steps: How to map attribute fields using Append<\/strong><\/span><\/h2>\n<p>Below are the attribute tables for a <code>LocalRoads<\/code> and <code>StateRoutes<\/code> dataset.<\/p>\n<p><em>Notice how the fields differ between the two datasets?<\/em> The <code>StateRoutes<\/code> dataset has three fields for the road name, and the year field is formatted differently in each dataset.<\/p>\n"},{"acf_fc_layout":"image","image":{"ID":2963091,"id":2963091,"title":"second_gif","filename":"second_gif.gif","filesize":227620,"url":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2026\/04\/second_gif.gif","link":"https:\/\/www.esri.com\/arcgis-blog\/products\/arcgis-pro\/analytics\/append-field-map-arcgis-pro\/second_gif","alt":"Attribute table","author":"314022","description":"","caption":"Attribute table ","name":"second_gif","status":"inherit","uploaded_to":2963046,"date":"2026-04-17 21:05:22","modified":"2026-04-17 21:05:34","menu_order":0,"mime_type":"image\/gif","type":"image","subtype":"gif","icon":"https:\/\/www.esri.com\/arcgis-blog\/wp-includes\/images\/media\/default.png","width":740,"height":494,"sizes":{"thumbnail":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2026\/04\/second_gif-213x200.gif","thumbnail-width":213,"thumbnail-height":200,"medium":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2026\/04\/second_gif.gif","medium-width":391,"medium-height":261,"medium_large":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2026\/04\/second_gif.gif","medium_large-width":740,"medium_large-height":494,"large":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2026\/04\/second_gif.gif","large-width":740,"large-height":494,"1536x1536":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2026\/04\/second_gif.gif","1536x1536-width":740,"1536x1536-height":494,"2048x2048":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2026\/04\/second_gif.gif","2048x2048-width":740,"2048x2048-height":494,"card_image":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2026\/04\/second_gif-697x465.gif","card_image-width":697,"card_image-height":465,"wide_image":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2026\/04\/second_gif.gif","wide_image-width":740,"wide_image-height":494}},"image_position":"center","orientation":"horizontal","hyperlink":""},{"acf_fc_layout":"content","content":"<p>Using the <a href=\"https:\/\/doc.esri.com\/en\/arcgis-pro\/latest\/tool-reference\/data-management\/append.html?tabs=dialog\" target=\"_blank\" rel=\"noopener\">Append<\/a> tool, specify the following parameters to load the line features from the <code>StateRoutes<\/code> dataset to the <code>LocalRoads<\/code> dataset:<\/p>\n<ol>\n<li><strong>Target Dataset:<\/strong> <code>LocalRoads<\/code><\/li>\n<li><strong>Input Datasets:<\/strong> <code>SateRoutes<\/code><\/li>\n<li><strong>Field Matching Type:<\/strong> <code>Use the field map to reconcile field differences<\/code><br \/>\n<em>This activates the <a href=\"https:\/\/doc.esri.com\/en\/arcgis-pro\/latest\/help\/analysis\/geoprocessing\/basics\/field-map.html#E2B\" target=\"_blank\" rel=\"noopener\">field map parameter<\/a>, where two target fields have a warning: StreetName and Year.<\/em><\/li>\n<\/ol>\n"},{"acf_fc_layout":"image","image":{"ID":2963116,"id":2963116,"title":"Append_FM_Blog_Image_6","filename":"Append_FM_Blog_Image_6.png","filesize":437620,"url":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2026\/04\/Append_FM_Blog_Image_6.png","link":"https:\/\/www.esri.com\/arcgis-blog\/products\/arcgis-pro\/analytics\/append-field-map-arcgis-pro\/append_fm_blog_image_6","alt":"Append tool with steps","author":"314022","description":"","caption":"Append tool with steps","name":"append_fm_blog_image_6","status":"inherit","uploaded_to":2963046,"date":"2026-04-17 21:23:33","modified":"2026-04-17 21:23:44","menu_order":0,"mime_type":"image\/png","type":"image","subtype":"png","icon":"https:\/\/www.esri.com\/arcgis-blog\/wp-includes\/images\/media\/default.png","width":792,"height":628,"sizes":{"thumbnail":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2026\/04\/Append_FM_Blog_Image_6-213x200.png","thumbnail-width":213,"thumbnail-height":200,"medium":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2026\/04\/Append_FM_Blog_Image_6.png","medium-width":329,"medium-height":261,"medium_large":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2026\/04\/Append_FM_Blog_Image_6.png","medium_large-width":768,"medium_large-height":609,"large":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2026\/04\/Append_FM_Blog_Image_6.png","large-width":792,"large-height":628,"1536x1536":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2026\/04\/Append_FM_Blog_Image_6.png","1536x1536-width":792,"1536x1536-height":628,"2048x2048":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2026\/04\/Append_FM_Blog_Image_6.png","2048x2048-width":792,"2048x2048-height":628,"card_image":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2026\/04\/Append_FM_Blog_Image_6-586x465.png","card_image-width":586,"card_image-height":465,"wide_image":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2026\/04\/Append_FM_Blog_Image_6.png","wide_image-width":792,"wide_image-height":628}},"image_position":"center","orientation":"horizontal","hyperlink":""},{"acf_fc_layout":"content","content":"<p>The <em>StreetName<\/em> field has a warning because there\u2019s no matching field with the same name in the <code>StateRoutes<\/code> dataset. To map source fields to the <em>StreetName<\/em> field:<\/p>\n<ol>\n<li>Click the first drop-down under the <strong>Source Fields<\/strong><\/li>\n<li>Check the <em>RoutePref<\/em>, <em>RouteNum<\/em> and <em>RouteSuffix<\/em> field boxes in the menu.<\/li>\n<li>Set the <strong>Action<\/strong> to <code>Concatenate<\/code>, and use a dash (\u2013) as the delimiter.<br \/>\n<em>This step is necessary to combine multiple source fields into one target field. If the default action (First) is used, only the first listed field would get written to StreetName.<\/em><\/li>\n<li>Click <strong>OK<\/strong> to add three source fields to the <em>StreetName<\/em> target field.<\/li>\n<li>The route prefix should appear first, so drag <em>RoutePref<\/em> above <em>RouteNum<\/em>.<\/li>\n<\/ol>\n"},{"acf_fc_layout":"image","image":{"ID":2963132,"id":2963132,"title":"steps-how-to-field-match","filename":"steps-how-to-field-match.gif","filesize":111763,"url":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2026\/04\/steps-how-to-field-match.gif","link":"https:\/\/www.esri.com\/arcgis-blog\/products\/arcgis-pro\/analytics\/append-field-map-arcgis-pro\/steps-how-to-field-match","alt":"Field mapping with steps","author":"314022","description":"","caption":"Field mapping with steps","name":"steps-how-to-field-match","status":"inherit","uploaded_to":2963046,"date":"2026-04-17 21:44:04","modified":"2026-04-17 21:44:16","menu_order":0,"mime_type":"image\/gif","type":"image","subtype":"gif","icon":"https:\/\/www.esri.com\/arcgis-blog\/wp-includes\/images\/media\/default.png","width":370,"height":430,"sizes":{"thumbnail":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2026\/04\/steps-how-to-field-match-213x200.gif","thumbnail-width":213,"thumbnail-height":200,"medium":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2026\/04\/steps-how-to-field-match.gif","medium-width":225,"medium-height":261,"medium_large":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2026\/04\/steps-how-to-field-match.gif","medium_large-width":370,"medium_large-height":430,"large":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2026\/04\/steps-how-to-field-match.gif","large-width":370,"large-height":430,"1536x1536":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2026\/04\/steps-how-to-field-match.gif","1536x1536-width":370,"1536x1536-height":430,"2048x2048":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2026\/04\/steps-how-to-field-match.gif","2048x2048-width":370,"2048x2048-height":430,"card_image":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2026\/04\/steps-how-to-field-match.gif","card_image-width":370,"card_image-height":430,"wide_image":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2026\/04\/steps-how-to-field-match.gif","wide_image-width":370,"wide_image-height":430}},"image_position":"center","orientation":"horizontal","hyperlink":""},{"acf_fc_layout":"content","content":"<p>The <em>Year<\/em> target field is already matched.<em> So, why does it have a warning? <\/em><\/p>\n<p>Hover the <em>Year<\/em> field\u2019s warning: <code>The field length is shorter than the source fields<\/code>. This message appears on text fields when the <em>target field<\/em> length is shorter than the <em>source field<\/em> length. In this example, the <em>Year<\/em> target field length is 4 whereas the source field length is 10. Attempting to load values that do not fit into a target field can cause a big problem when running Append!<\/p>\n<p>Follow the steps below to reconcile the field length difference:<\/p>\n<ol>\n<li>Right-click the <em>Year<\/em> source field &gt; Click <strong>Edit text slicing<\/strong>.<\/li>\n<li>In the <strong>Slice Text<\/strong> dialog box, specify the text position to start at 6 and end at 9, then click <strong>Add<\/strong>.<br \/>\n<em>The year information in the source field starts at the 7th character, where the first character has index of 0.<\/em><\/li>\n<\/ol>\n"},{"acf_fc_layout":"image","image":{"ID":2963159,"id":2963159,"title":"TextSlicing_gif","filename":"TextSlicing_gif-1.gif","filesize":77820,"url":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2026\/04\/TextSlicing_gif-1.gif","link":"https:\/\/www.esri.com\/arcgis-blog\/products\/arcgis-pro\/analytics\/append-field-map-arcgis-pro\/textslicing_gif-2","alt":"Text slicing steps","author":"314022","description":"","caption":"How to slice text using the Field Map","name":"textslicing_gif-2","status":"inherit","uploaded_to":2963046,"date":"2026-04-20 02:03:55","modified":"2026-04-20 02:04:35","menu_order":0,"mime_type":"image\/gif","type":"image","subtype":"gif","icon":"https:\/\/www.esri.com\/arcgis-blog\/wp-includes\/images\/media\/default.png","width":370,"height":418,"sizes":{"thumbnail":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2026\/04\/TextSlicing_gif-1-213x200.gif","thumbnail-width":213,"thumbnail-height":200,"medium":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2026\/04\/TextSlicing_gif-1.gif","medium-width":231,"medium-height":261,"medium_large":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2026\/04\/TextSlicing_gif-1.gif","medium_large-width":370,"medium_large-height":418,"large":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2026\/04\/TextSlicing_gif-1.gif","large-width":370,"large-height":418,"1536x1536":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2026\/04\/TextSlicing_gif-1.gif","1536x1536-width":370,"1536x1536-height":418,"2048x2048":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2026\/04\/TextSlicing_gif-1.gif","2048x2048-width":370,"2048x2048-height":418,"card_image":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2026\/04\/TextSlicing_gif-1.gif","card_image-width":370,"card_image-height":418,"wide_image":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2026\/04\/TextSlicing_gif-1.gif","wide_image-width":370,"wide_image-height":418}},"image_position":"center","orientation":"horizontal","hyperlink":""},{"acf_fc_layout":"content","content":"<p>Now that all field differences have been reconciled, run the Append tool.<\/p>\n<p><span style=\"color: #2f5496\"><strong>Result:<\/strong><\/span> The target dataset, <code>LocalRoads<\/code>, should update from <strong>509<\/strong> to <strong>572<\/strong> total line-features.<\/p>\n"},{"acf_fc_layout":"image","image":{"ID":2963133,"id":2963133,"title":"last_image_in_blog","filename":"last_image_in_blog.png","filesize":63502,"url":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2026\/04\/last_image_in_blog.png","link":"https:\/\/www.esri.com\/arcgis-blog\/products\/arcgis-pro\/analytics\/append-field-map-arcgis-pro\/last_image_in_blog","alt":"Appended records","author":"314022","description":"","caption":"Appended records in the Target dataset","name":"last_image_in_blog","status":"inherit","uploaded_to":2963046,"date":"2026-04-17 21:46:04","modified":"2026-04-17 21:46:37","menu_order":0,"mime_type":"image\/png","type":"image","subtype":"png","icon":"https:\/\/www.esri.com\/arcgis-blog\/wp-includes\/images\/media\/default.png","width":738,"height":325,"sizes":{"thumbnail":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2026\/04\/last_image_in_blog-213x200.png","thumbnail-width":213,"thumbnail-height":200,"medium":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2026\/04\/last_image_in_blog.png","medium-width":464,"medium-height":204,"medium_large":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2026\/04\/last_image_in_blog.png","medium_large-width":738,"medium_large-height":325,"large":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2026\/04\/last_image_in_blog.png","large-width":738,"large-height":325,"1536x1536":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2026\/04\/last_image_in_blog.png","1536x1536-width":738,"1536x1536-height":325,"2048x2048":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2026\/04\/last_image_in_blog.png","2048x2048-width":738,"2048x2048-height":325,"card_image":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2026\/04\/last_image_in_blog.png","card_image-width":738,"card_image-height":325,"wide_image":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2026\/04\/last_image_in_blog.png","wide_image-width":738,"wide_image-height":325}},"image_position":"center","orientation":"horizontal","hyperlink":""},{"acf_fc_layout":"content","content":"<h1><span style=\"color: #2f5496\"><strong>Summary<\/strong><\/span><\/h1>\n<p>In <strong>ArcGIS Pro 3.7<\/strong>, the Append tool has an <a href=\"https:\/\/doc.esri.com\/en\/arcgis-pro\/latest\/help\/analysis\/geoprocessing\/basics\/field-map.html#JUY\" target=\"_blank\" rel=\"noopener\">updated field map<\/a>. You can now view all target and source fields at a glance and perform field matching directly on the tool dialog box.<\/p>\n<p>If you need a larger view of all your fields, click the <strong>Edit<\/strong> button to open the Field Properties window. That way, you can view many target fields at once and perform all your field mapping tasks in one place.<\/p>\n"}],"related_articles":[{"ID":2662772,"post_author":"314022","post_date":"2025-02-10 07:32:21","post_date_gmt":"2025-02-10 15:32:21","post_content":"","post_title":"Where is the ArcMap Object Loader and Simple Data Loader in ArcGIS Pro?","post_excerpt":"","post_status":"publish","comment_status":"open","ping_status":"closed","post_password":"","post_name":"where-is-the-arcmap-object-loader-and-simple-data-loader-in-arcgis-pro","to_ping":"","pinged":"","post_modified":"2025-02-13 12:08:02","post_modified_gmt":"2025-02-13 20:08:02","post_content_filtered":"","post_parent":0,"guid":"https:\/\/www.esri.com\/arcgis-blog\/?post_type=blog&#038;p=2662772","menu_order":0,"post_type":"blog","post_mime_type":"","comment_count":"0","filter":"raw"},{"ID":2191992,"post_author":"314022","post_date":"2023-12-13 08:13:15","post_date_gmt":"2023-12-13 16:13:15","post_content":"","post_title":"Big improvements for field management in Geoprocessing in ArcGIS Pro 3.2","post_excerpt":"","post_status":"publish","comment_status":"open","ping_status":"closed","post_password":"","post_name":"big-improvements-to-the-field-map-in-arcgis","to_ping":"","pinged":"","post_modified":"2025-06-04 08:19:03","post_modified_gmt":"2025-06-04 15:19:03","post_content_filtered":"","post_parent":0,"guid":"https:\/\/www.esri.com\/arcgis-blog\/?post_type=blog&#038;p=2191992","menu_order":0,"post_type":"blog","post_mime_type":"","comment_count":"3","filter":"raw"},{"ID":1855322,"post_author":"314022","post_date":"2023-02-27 07:15:32","post_date_gmt":"2023-02-27 15:15:32","post_content":"","post_title":"Upsert your datasets using the Append tool in ArcGIS Pro 3.1","post_excerpt":"","post_status":"publish","comment_status":"open","ping_status":"closed","post_password":"","post_name":"upsert-your-datasets-using-the-append-tool-in-arcgis-pro-3-1","to_ping":"","pinged":"","post_modified":"2023-03-09 14:29:27","post_modified_gmt":"2023-03-09 22:29:27","post_content_filtered":"","post_parent":0,"guid":"https:\/\/www.esri.com\/arcgis-blog\/?post_type=blog&#038;p=1855322","menu_order":0,"post_type":"blog","post_mime_type":"","comment_count":"6","filter":"raw"}],"authors":[{"ID":314022,"user_firstname":"Margaret","user_lastname":"Crawford","nickname":"Margaret Crawford","user_nicename":"mcrawford","display_name":"Margaret Crawford","user_email":"mcrawford@esri.com","user_url":"","user_registered":"2022-06-28 19:13:27","user_description":"Margaret is a Product Engineer on the ArcGIS Pro Geoprocessing team. Her passion for GIS began with her interest in human-environmental relationships, where her graduate thesis studied the growing impact of cascading disasters caused by sea level rise. Margaret leverages her foundation in research methodologies and spatial analysis techniques in her role at Esri, where she creates written content and demonstrations on new features in ArcGIS Pro. She also utilizes user feedback to refine and redesign the geoprocessing interface. In her personal life, Margaret is a loving cat parent to three beautiful cats.","user_avatar":"<img data-del=\"avatar\" src='https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2023\/03\/PXL_20230310_184124630.PORTRAIT234-465x465.jpg' class='avatar pp-user-avatar avatar-96 photo ' height='96' width='96'\/>"}],"show_article_image":false,"card_image":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2026\/05\/field_map_append_37_card_image.png","wide_image":false},"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v25.9 (Yoast SEO v25.9) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Simplified field mapping when loading data with Append | ArcGIS Blog<\/title>\n<meta name=\"description\" content=\"In ArcGIS Pro 3.7, the field map parameter in the Append too has been updated to support more field mapping capabilities.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link 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Her passion for GIS began with her interest in human-environmental relationships, where her graduate thesis studied the growing impact of cascading disasters caused by sea level rise. Margaret leverages her foundation in research methodologies and spatial analysis techniques in her role at Esri, where she creates written content and demonstrations on new features in ArcGIS Pro. She also utilizes user feedback to refine and redesign the geoprocessing interface. In her personal life, Margaret is a loving cat parent to three beautiful cats.","knowsLanguage":["English"],"jobTitle":"Product Engineer","worksFor":"Esri","url":"https:\/\/www.esri.com\/arcgis-blog\/author\/mcrawford"}]}},"text_date":"May 27, 2026","author_name":"Margaret Crawford","author_page":"https:\/\/www.esri.com\/arcgis-blog\/author\/mcrawford","custom_image":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2025\/08\/Newsroom-Keyart-Wide-1920-x-1080.jpg","primary_product":"ArcGIS Pro","tag_data":[{"term_id":757971,"name":"Append","slug":"append","term_group":0,"term_taxonomy_id":757971,"taxonomy":"post_tag","description":"","parent":0,"count":8,"filter":"raw"},{"term_id":42181,"name":"ArcGIS Pro","slug":"arcgis-pro","term_group":0,"term_taxonomy_id":42181,"taxonomy":"post_tag","description":"","parent":0,"count":334,"filter":"raw"},{"term_id":781000,"name":"ArcGIS Pro 3.7","slug":"arcgis-pro-3-7","term_group":0,"term_taxonomy_id":781000,"taxonomy":"post_tag","description":"","parent":0,"count":13,"filter":"raw"},{"term_id":24321,"name":"geoprocessing","slug":"geoprocessing","term_group":0,"term_taxonomy_id":24321,"taxonomy":"post_tag","description":"","parent":0,"count":133,"filter":"raw"},{"term_id":773052,"name":"geoprocessing tools","slug":"geoprocessing-tools","term_group":0,"term_taxonomy_id":773052,"taxonomy":"post_tag","description":"","parent":0,"count":13,"filter":"raw"}],"category_data":[{"term_id":23341,"name":"Analytics","slug":"analytics","term_group":0,"term_taxonomy_id":23341,"taxonomy":"category","description":"","parent":0,"count":1346,"filter":"raw"},{"term_id":37101,"name":"Announcements","slug":"announcements","term_group":0,"term_taxonomy_id":37101,"taxonomy":"category","description":"","parent":0,"count":2011,"filter":"raw"},{"term_id":23851,"name":"Data Management","slug":"data-management","term_group":0,"term_taxonomy_id":23851,"taxonomy":"category","description":"","parent":0,"count":941,"filter":"raw"}],"product_data":[{"term_id":36561,"name":"ArcGIS Pro","slug":"arcgis-pro","term_group":0,"term_taxonomy_id":36561,"taxonomy":"product","description":"","parent":0,"count":2094,"filter":"raw"}],"primary_product_link":"https:\/\/www.esri.com\/arcgis-blog\/?s=#&products=arcgis-pro","_links":{"self":[{"href":"https:\/\/www.esri.com\/arcgis-blog\/wp-json\/wp\/v2\/blog\/2963046","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.esri.com\/arcgis-blog\/wp-json\/wp\/v2\/blog"}],"about":[{"href":"https:\/\/www.esri.com\/arcgis-blog\/wp-json\/wp\/v2\/types\/blog"}],"author":[{"embeddable":true,"href":"https:\/\/www.esri.com\/arcgis-blog\/wp-json\/wp\/v2\/users\/314022"}],"replies":[{"embeddable":true,"href":"https:\/\/www.esri.com\/arcgis-blog\/wp-json\/wp\/v2\/comments?post=2963046"}],"version-history":[{"count":0,"href":"https:\/\/www.esri.com\/arcgis-blog\/wp-json\/wp\/v2\/blog\/2963046\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.esri.com\/arcgis-blog\/wp-json\/wp\/v2\/media?parent=2963046"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.esri.com\/arcgis-blog\/wp-json\/wp\/v2\/categories?post=2963046"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.esri.com\/arcgis-blog\/wp-json\/wp\/v2\/tags?post=2963046"},{"taxonomy":"industry","embeddable":true,"href":"https:\/\/www.esri.com\/arcgis-blog\/wp-json\/wp\/v2\/industry?post=2963046"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.esri.com\/arcgis-blog\/wp-json\/wp\/v2\/product?post=2963046"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}