{"id":497942,"date":"2019-04-29T11:35:49","date_gmt":"2019-04-29T18:35:49","guid":{"rendered":"https:\/\/www.esri.com\/arcgis-blog\/?post_type=blog&#038;p=497942"},"modified":"2019-04-29T15:43:31","modified_gmt":"2019-04-29T22:43:31","slug":"make-a-custom-projection","status":"publish","type":"blog","link":"https:\/\/www.esri.com\/arcgis-blog\/products\/arcgis-pro\/mapping\/make-a-custom-projection","title":{"rendered":"Ice Road to Diamonds Part 2: Make a Custom Projection"},"author":7411,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","format":"standard","meta":{"_acf_changed":false,"_searchwp_excluded":""},"categories":[22941],"tags":[25591,26451,169802,169792],"industry":[],"product":[36561],"class_list":["post-497942","blog","type-blog","status-publish","format-standard","hentry","category-mapping","tag-arcgis-desktop","tag-cartography","tag-coordinate-systems","tag-projections","product-arcgis-pro"],"acf":{"short_description":"Learn how to build a custom coordinate system in ArcGIS Pro.","flexible_content":[{"acf_fc_layout":"content","content":"<p>Projections are cool. Custom projections are cooler. And despite what you may think, they are not difficult to make.<\/p>\n<p>This post is part 2 of a little series I&#8217;m writing about the making of <a href=\"http:\/\/www.heathergabrielsmith.ca\/maps\/html\/iceroad.html\" target=\"_blank\" rel=\"noopener\">this map of the Tibbitt to Contwoyto Winter Road<\/a> in northern Canada. For this map, I made a custom projection.<\/p>\n<p>If you want to follow along, add <a href=\"https:\/\/www.arcgis.com\/home\/item.html?id=2b530228ad724888992729da4b6efbd9\" target=\"_blank\" rel=\"noopener\">this layer<\/a> to ArcGIS Pro.<\/p>\n"},{"acf_fc_layout":"image","image":{"ID":500432,"id":500432,"title":"road","filename":"road.png","filesize":15821,"url":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2020\/04\/road.png","link":"https:\/\/www.esri.com\/arcgis-blog\/products\/arcgis-pro\/mapping\/make-a-custom-projection\/road","alt":"Road layer on topographic basemap","author":"7411","description":"","caption":"","name":"road","status":"inherit","uploaded_to":497942,"date":"2019-04-24 23:57:03","modified":"2019-04-24 23:57:16","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":286,"height":342,"sizes":{"thumbnail":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2020\/04\/road-150x150.png","thumbnail-width":150,"thumbnail-height":150,"medium":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2020\/04\/road.png","medium-width":218,"medium-height":261,"medium_large":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2020\/04\/road.png","medium_large-width":286,"medium_large-height":342,"large":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2020\/04\/road.png","large-width":286,"large-height":342,"1536x1536":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2020\/04\/road.png","1536x1536-width":286,"1536x1536-height":342,"2048x2048":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2020\/04\/road.png","2048x2048-width":286,"2048x2048-height":342,"card_image":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2020\/04\/road.png","card_image-width":286,"card_image-height":342,"wide_image":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2020\/04\/road.png","wide_image-width":286,"wide_image-height":342}},"image_position":"center","orientation":"horizontal","hyperlink":""},{"acf_fc_layout":"content","content":"<p>This layer represents the ice road which is the theme of my map, and some adjacent roads. I want to choose a projection which is suitable for it.<\/p>\n<p>1. Open<strong> Map Properties<\/strong> in ArcGIS Pro and click the\u00a0<strong>Coordinate Systems<\/strong>\u00a0tab.<\/p>\n<p>2. Click <strong>Spatial Filter<\/strong> and\u00a0<strong>Set Spatial Filter.<\/strong><\/p>\n"},{"acf_fc_layout":"image","image":{"ID":500422,"id":500422,"title":"filter","filename":"filter.png","filesize":15194,"url":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2020\/04\/filter.png","link":"https:\/\/www.esri.com\/arcgis-blog\/products\/arcgis-pro\/mapping\/make-a-custom-projection\/filter-6","alt":"Set Spatial Filter on the Coordinate Systems page","author":"7411","description":"","caption":"","name":"filter-6","status":"inherit","uploaded_to":497942,"date":"2019-04-24 23:48:32","modified":"2019-04-24 23:48:47","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":420,"height":154,"sizes":{"thumbnail":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2020\/04\/filter-150x150.png","thumbnail-width":150,"thumbnail-height":150,"medium":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2020\/04\/filter.png","medium-width":420,"medium-height":154,"medium_large":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2020\/04\/filter.png","medium_large-width":420,"medium_large-height":154,"large":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2020\/04\/filter.png","large-width":420,"large-height":154,"1536x1536":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2020\/04\/filter.png","1536x1536-width":420,"1536x1536-height":154,"2048x2048":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2020\/04\/filter.png","2048x2048-width":420,"2048x2048-height":154,"card_image":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2020\/04\/filter.png","card_image-width":420,"card_image-height":154,"wide_image":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2020\/04\/filter.png","wide_image-width":420,"wide_image-height":154}},"image_position":"center","orientation":"horizontal","hyperlink":""},{"acf_fc_layout":"content","content":"<p>This dialog will filter the list of available coordinate systems to only the ones that cover your chosen extent.<\/p>\n<p>3. Click <strong>roads<\/strong> so the extent will match that of the roads layer. Click <strong>Apply<\/strong>.<\/p>\n<p>4. In the coordinate system list, expand\u00a0<strong>Projected coordinate systems<\/strong>. Have a look through this list to see if there are any obvious candidates.<\/p>\n"},{"acf_fc_layout":"image","image":{"ID":500442,"id":500442,"title":"projections","filename":"projections.png","filesize":13442,"url":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2020\/04\/projections.png","link":"https:\/\/www.esri.com\/arcgis-blog\/products\/arcgis-pro\/mapping\/make-a-custom-projection\/projections","alt":"Projected coordinate systems list with National Grids > Canada and UTM > WGS 1984 expanded","author":"7411","description":"","caption":"","name":"projections","status":"inherit","uploaded_to":497942,"date":"2019-04-25 00:02:59","modified":"2019-04-25 00:03:30","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":350,"height":405,"sizes":{"thumbnail":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2020\/04\/projections-150x150.png","thumbnail-width":150,"thumbnail-height":150,"medium":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2020\/04\/projections.png","medium-width":226,"medium-height":261,"medium_large":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2020\/04\/projections.png","medium_large-width":350,"medium_large-height":405,"large":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2020\/04\/projections.png","large-width":350,"large-height":405,"1536x1536":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2020\/04\/projections.png","1536x1536-width":350,"1536x1536-height":405,"2048x2048":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2020\/04\/projections.png","2048x2048-width":350,"2048x2048-height":405,"card_image":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2020\/04\/projections.png","card_image-width":350,"card_image-height":405,"wide_image":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2020\/04\/projections.png","wide_image-width":350,"wide_image-height":405}},"image_position":"center","orientation":"horizontal","hyperlink":""},{"acf_fc_layout":"content","content":"<p>A nice obvious candidate would be called something like &#8220;NAD 1983 Tibbitt to Contwoyto Winter Road.&#8221; But of course there is nothing quite so specific.<\/p>\n<p>Usually I just go for the appropriate UTM Zone projection. But in this case, the extent of the road layer covers 2 UTM Zones. <em>NAD 1983 Northwest Territories Lambert<\/em> looks like a good choice, but the road also extends into Nunavut territory.<\/p>\n<p>I decided to make a custom projection instead.<\/p>\n<p>5. Visit the <a href=\"http:\/\/projectionwizard.org\/\">Projection Wizard.<\/a> This handy tool (created by Bojan \u0160avri\u010d) will suggest a custom projection for you based on your desired extent and distortion property. You don&#8217;t need to know how to create projections, you just need to know what you want.<\/p>\n<p>6. First, set an extent. You can either drag the corners of the blue box, or zoom in and click the <strong>Fit Area<\/strong> button. I just eyeballed it to match the general extent of my road layer, but you can enter precise values if you prefer.<\/p>\n"},{"acf_fc_layout":"image","image":{"ID":497992,"id":497992,"title":"fit-area","filename":"fit-area.png","filesize":42533,"url":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2019\/04\/fit-area.png","link":"https:\/\/www.esri.com\/arcgis-blog\/products\/arcgis-pro\/mapping\/make-a-custom-projection\/fit-area","alt":"Setting an extent in Projection Wizard","author":"7411","description":"","caption":"","name":"fit-area","status":"inherit","uploaded_to":497942,"date":"2019-04-23 18:38:50","modified":"2019-04-23 18:43:16","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":458,"height":346,"sizes":{"thumbnail":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2019\/04\/fit-area-150x150.png","thumbnail-width":150,"thumbnail-height":150,"medium":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2019\/04\/fit-area.png","medium-width":345,"medium-height":261,"medium_large":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2019\/04\/fit-area.png","medium_large-width":458,"medium_large-height":346,"large":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2019\/04\/fit-area.png","large-width":458,"large-height":346,"1536x1536":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2019\/04\/fit-area.png","1536x1536-width":458,"1536x1536-height":346,"2048x2048":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2019\/04\/fit-area.png","2048x2048-width":458,"2048x2048-height":346,"card_image":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2019\/04\/fit-area.png","card_image-width":458,"card_image-height":346,"wide_image":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2019\/04\/fit-area.png","wide_image-width":458,"wide_image-height":346}},"image_position":"center","orientation":"horizontal","hyperlink":""},{"acf_fc_layout":"content","content":"<p>7. Next, choose a <strong>Distortion Property<\/strong>.<\/p>\n<p>All projections will distort something in order to preserve something else. Mercator, for example, is a conformal projection. This means it will preserve angles at the expense of area, so the shapes of features appear correct, but their sizes are distorted. If you don&#8217;t know what to choose, you can <a href=\"http:\/\/desktop.arcgis.com\/en\/arcmap\/10.3\/guide-books\/map-projections\/about-map-projections.htm\" target=\"_blank\" rel=\"noopener\">read about projection types here<\/a>.<\/p>\n<p>8. I chose <strong>Conformal<\/strong> because I wanted to preserve the relative shapes of the lakes in my map. Mine is a thematic map and not very concerned with making measurements of areas or distances.<\/p>\n<p>The tool recommended <strong>Lambert conformal conic<\/strong> and gave me four parameters for fitting this projection to my specific area:<\/p>\n<ul>\n<li>Latitude of origin: 63\u00b0 59&#8242; N<\/li>\n<li>Standard parallel 1: 62\u00b0 28&#8242; N<\/li>\n<li>Standard parallel 2: 65\u00b0 31&#8242; N<\/li>\n<li>Central meridian: 111\u00b0 38&#8242; W<\/li>\n<\/ul>\n<p>9. You can use these parameters in ArcMap or ArcGIS Pro. But first you need to convert from the Degrees, Minutes, Seconds format into decimal degrees. There are a lot of online tools that can do that for you. <a href=\"http:\/\/www.onlineconversion.com\/map_decimaldegrees.htm\" target=\"_blank\" rel=\"noopener\">This is just one of them<\/a>.<\/p>\n<p>10. Back in ArcGIS Pro, on the <strong>Map Properties <\/strong>page, click <strong>Add Coordinate System <\/strong>and choose <strong>New Projected Coordinate System<\/strong>.<\/p>\n"},{"acf_fc_layout":"image","image":{"ID":498032,"id":498032,"title":"newPCS","filename":"newPCS.png","filesize":24709,"url":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2019\/04\/newPCS.png","link":"https:\/\/www.esri.com\/arcgis-blog\/products\/arcgis-pro\/mapping\/make-a-custom-projection\/newpcs","alt":"New Projected Coordinate System option in Map Properties","author":"7411","description":"","caption":"","name":"newpcs","status":"inherit","uploaded_to":497942,"date":"2019-04-23 18:49:25","modified":"2019-04-23 18:50:00","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":600,"height":335,"sizes":{"thumbnail":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2019\/04\/newPCS-150x150.png","thumbnail-width":150,"thumbnail-height":150,"medium":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2019\/04\/newPCS.png","medium-width":464,"medium-height":259,"medium_large":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2019\/04\/newPCS.png","medium_large-width":600,"medium_large-height":335,"large":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2019\/04\/newPCS.png","large-width":600,"large-height":335,"1536x1536":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2019\/04\/newPCS.png","1536x1536-width":600,"1536x1536-height":335,"2048x2048":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2019\/04\/newPCS.png","2048x2048-width":600,"2048x2048-height":335,"card_image":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2019\/04\/newPCS.png","card_image-width":600,"card_image-height":335,"wide_image":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2019\/04\/newPCS.png","wide_image-width":600,"wide_image-height":335}},"image_position":"center","orientation":"horizontal","hyperlink":""},{"acf_fc_layout":"content","content":"<p>11. Give your new projection a new name, and edit the properties to match the values provided by Projection Wizard.<\/p>\n"},{"acf_fc_layout":"image","image":{"ID":498052,"id":498052,"title":"customPCS","filename":"customPCS.png","filesize":9460,"url":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2019\/04\/customPCS.png","link":"https:\/\/www.esri.com\/arcgis-blog\/products\/arcgis-pro\/mapping\/make-a-custom-projection\/custompcs","alt":"New Projected Coordinate System dialog with properties to match Projection Wizard","author":"7411","description":"","caption":"","name":"custompcs","status":"inherit","uploaded_to":497942,"date":"2019-04-23 18:50:33","modified":"2019-04-23 18:50:55","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":450,"height":450,"sizes":{"thumbnail":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2019\/04\/customPCS-150x150.png","thumbnail-width":150,"thumbnail-height":150,"medium":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2019\/04\/customPCS.png","medium-width":261,"medium-height":261,"medium_large":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2019\/04\/customPCS.png","medium_large-width":450,"medium_large-height":450,"large":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2019\/04\/customPCS.png","large-width":450,"large-height":450,"1536x1536":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2019\/04\/customPCS.png","1536x1536-width":450,"1536x1536-height":450,"2048x2048":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2019\/04\/customPCS.png","2048x2048-width":450,"2048x2048-height":450,"card_image":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2019\/04\/customPCS.png","card_image-width":450,"card_image-height":450,"wide_image":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2019\/04\/customPCS.png","wide_image-width":450,"wide_image-height":450}},"image_position":"center","orientation":"horizontal","hyperlink":""},{"acf_fc_layout":"content","content":"<p>12. Click <strong>Save<\/strong>. The\u00a0<strong>Current XY<\/strong> button now reads\u00a0<strong>Ice Road<\/strong> to indicate it is the current coordinate system for the map.<\/p>\n<p>13. Find the new coordinate system under the <strong>Custom<\/strong> category. Right-click and choose <strong>Add to Favorites<\/strong>. Right-click again and choose <strong>Save as Projection File<\/strong>.<\/p>\n"},{"acf_fc_layout":"image","image":{"ID":498082,"id":498082,"title":"customCS","filename":"customCS.png","filesize":7136,"url":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2020\/04\/customCS.png","link":"https:\/\/www.esri.com\/arcgis-blog\/products\/arcgis-pro\/mapping\/make-a-custom-projection\/customcs","alt":"Context menu for the custom coordinate system","author":"7411","description":"","caption":"","name":"customcs","status":"inherit","uploaded_to":497942,"date":"2019-04-23 18:51:48","modified":"2019-04-23 18:52:01","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":325,"height":126,"sizes":{"thumbnail":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2020\/04\/customCS-150x126.png","thumbnail-width":150,"thumbnail-height":126,"medium":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2020\/04\/customCS.png","medium-width":325,"medium-height":126,"medium_large":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2020\/04\/customCS.png","medium_large-width":325,"medium_large-height":126,"large":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2020\/04\/customCS.png","large-width":325,"large-height":126,"1536x1536":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2020\/04\/customCS.png","1536x1536-width":325,"1536x1536-height":126,"2048x2048":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2020\/04\/customCS.png","2048x2048-width":325,"2048x2048-height":126,"card_image":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2020\/04\/customCS.png","card_image-width":325,"card_image-height":126,"wide_image":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2020\/04\/customCS.png","wide_image-width":325,"wide_image-height":126}},"image_position":"center","orientation":"horizontal","hyperlink":""},{"acf_fc_layout":"content","content":"<p>Step 13 is optional, but highly recommended. Otherwise you risk losing your new coordinate system, since the Custom category is only a temporary holding space.<\/p>\n<p>14. If you want to apply your newly-saved projection to a different map, click <strong>Add Coordinate System<\/strong> and choose <strong>Import Coordinate System<\/strong>. Browse to the .prj file that you saved in step 13.<\/p>\n"},{"acf_fc_layout":"image","image":{"ID":498102,"id":498102,"title":"importCS","filename":"importCS.png","filesize":4391,"url":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2020\/04\/importCS.png","link":"https:\/\/www.esri.com\/arcgis-blog\/products\/arcgis-pro\/mapping\/make-a-custom-projection\/importcs","alt":"Import Coordinate System","author":"7411","description":"","caption":"","name":"importcs","status":"inherit","uploaded_to":497942,"date":"2019-04-23 18:52:55","modified":"2019-04-23 18:53:04","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":312,"height":132,"sizes":{"thumbnail":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2020\/04\/importCS-150x132.png","thumbnail-width":150,"thumbnail-height":132,"medium":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2020\/04\/importCS.png","medium-width":312,"medium-height":132,"medium_large":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2020\/04\/importCS.png","medium_large-width":312,"medium_large-height":132,"large":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2020\/04\/importCS.png","large-width":312,"large-height":132,"1536x1536":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2020\/04\/importCS.png","1536x1536-width":312,"1536x1536-height":132,"2048x2048":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2020\/04\/importCS.png","2048x2048-width":312,"2048x2048-height":132,"card_image":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2020\/04\/importCS.png","card_image-width":312,"card_image-height":132,"wide_image":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2020\/04\/importCS.png","wide_image-width":312,"wide_image-height":132}},"image_position":"center","orientation":"horizontal","hyperlink":""},{"acf_fc_layout":"content","content":"<p>You can learn more about choosing the right projection for your map at <a href=\"http:\/\/desktop.arcgis.com\/en\/arcmap\/10.3\/tools\/coverage-toolbox\/choosing-a-map-projection.htm\" target=\"_blank\" rel=\"noopener\">this help topic.<\/a><\/p>\n<p>You can read the first blog in this series, at Prep Your Cartography Project.<\/p>\n<p>You can download the <a href=\"https:\/\/www.arcgis.com\/home\/item.html?id=6acefc17fcd4406ca0faaaeb1a7bf140\" target=\"_blank\" rel=\"noopener\">project package of the final map<\/a> to see this custom coordinate system in action.<\/p>\n<p>&nbsp;<\/p>\n"}],"authors":[{"ID":7411,"user_firstname":"Heather","user_lastname":"Smith","nickname":"Heather Smith","user_nicename":"heather-smith","display_name":"Heather Smith","user_email":"Heather_Smith@esri.com","user_url":"","user_registered":"2018-03-21 18:21:18","user_description":"Heather is a cartographer and artist. She creates resources for the tutorial gallery.","user_avatar":"<img data-del=\"avatar\" src='https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2024\/10\/heather900-465x465.png' class='avatar pp-user-avatar avatar-96 photo ' height='96' width='96'\/>"}],"related_articles":[{"ID":120551,"post_author":"4331","post_date":"2011-03-24 23:30:00","post_date_gmt":"2011-03-24 23:30:00","post_content":"","post_title":"Tissot's indicatrix helps illustrate map projection distortion","post_excerpt":"","post_status":"publish","comment_status":"open","ping_status":"closed","post_password":"","post_name":"tissots-indicatrix-helps-illustrate-map-projection-distortion","to_ping":"","pinged":"","post_modified":"2024-02-26 19:41:03","post_modified_gmt":"2024-02-27 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