{"id":185021,"date":"2013-09-26T22:32:19","date_gmt":"2013-09-26T22:32:19","guid":{"rendered":"http:\/\/www.esri.com\/arcgis-blog\/?post_type=blog&#038;p=185021"},"modified":"2024-01-18T15:33:49","modified_gmt":"2024-01-18T23:33:49","slug":"raster-pixel-editor","status":"publish","type":"blog","link":"https:\/\/www.esri.com\/arcgis-blog\/products\/arcgis-desktop\/imagery\/raster-pixel-editor","title":{"rendered":"Raster Pixel Editor"},"author":5141,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","format":"standard","meta":{"_acf_changed":false,"_searchwp_excluded":""},"categories":[22931],"tags":[22821,23011],"industry":[],"product":[36991],"class_list":["post-185021","blog","type-blog","status-publish","format-standard","hentry","category-imagery","tag-oceans-and-maritime","tag-raster","product-arcgis-desktop"],"acf":{"short_description":"Sometimes you want to change the values of the pixels in your rasters. It\u2019s not something you\u2019d necessarily want to do with imagery","flexible_content":[{"acf_fc_layout":"content","content":"<p>Sometimes you want to change the values of the pixels in your rasters. It\u2019s not something you\u2019d necessarily want to do with imagery, but when working with categorical rasters or an elevation model, it can come in handy. Here\u2019s an example that shows how to create a barrier wall for flood prevention on the Outer Banks in North Carolina. Essentially I\u2019ll be creating a new raster which could then be applied to a flood model.<\/p>\n<p>Start with your elevation data and a shapefile that delineates where the wall would go up. Keep in mind that it needs to be a polygon for this to work. When I did this, I created a polyline shapefile and then added a 1 m buffer to it.<\/p>\n<p><a href=\"http:\/\/blogs.esri.com\/esri\/arcgis\/files\/2013\/09\/images_ZF.png\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-31839\" src=\"http:\/\/blogs.esri.com\/esri\/arcgis\/files\/2013\/09\/images_ZF.png\" alt=\"outer banks\" width=\"760\" height=\"471\" \/><\/a><\/p>\n<p>From the Image Analysis Window, select the elevation layer, and add a function.<\/p>\n<p><a href=\"http:\/\/blogs.esri.com\/esri\/arcgis\/files\/2013\/09\/add_function_ZF.png\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-31840\" src=\"http:\/\/blogs.esri.com\/esri\/arcgis\/files\/2013\/09\/add_function_ZF.png\" alt=\"Add a function\" width=\"312\" height=\"1116\" \/><\/a>In the Editor that pops up, right click on the raster layer and insert a Constant Function. The constant should be the height of the wall that you want to build plus the underlying elevation. Because I\u2019m looking at coastal data, 25 m is fine. If I was modeling the impact of constructing a dam in a high elevation area, I would want to add the elevation to the height of the dam.<\/p>\n<p>After adding the Constant Function, keep the Editor open, and add a Clip Function. Navigate to the shapefile that you created for your area of interest. Select Outside for the Type, and check the box next to Use Input Features for Clipping Geometry. Click OK.<\/p>\n<p>In the Editor window, add a Local Function above the Constant Function. Use the Plus icon to add a raster from disk and select the original elevation data. Under Operations, scroll down and select Maximum (Ignore NoData). Change the extent to Union. Click OK, and you\u2019re all set.<\/p>\n<p>You can create a shapefile for any area of interest and reuse this function chain to work as a pixel editor. You\u2019re not limited to changing the values of the pixels, you can use any of the functions that you want like filtering, statistics, band math, etc.<\/p>\n"}],"authors":[{"ID":5991,"user_firstname":"Jeff","user_lastname":"Liedtke","nickname":"Jeff Liedtke","user_nicename":"jliedtke","display_name":"Jeff Liedtke","user_email":"JLiedtke@esri.com","user_url":"","user_registered":"2018-03-02 00:17:51","user_description":"Jeff Liedtke is a PE and Documentation Lead for the Raster Team at Esri.  He has a background in remote sensing, photogrammetry and image processing. Applying remote sensing techniques to provide valuable information for operational decision support applications is his passion.","user_avatar":"<img data-del=\"avatar\" src='https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2018\/08\/jeff1.jpg' class='avatar pp-user-avatar avatar-96 photo ' height='96' width='96'\/>"}],"related_articles":"","card_image":false,"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>Raster Pixel Editor<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.esri.com\/arcgis-blog\/products\/arcgis-desktop\/imagery\/raster-pixel-editor\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Raster Pixel Editor\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.esri.com\/arcgis-blog\/products\/arcgis-desktop\/imagery\/raster-pixel-editor\" \/>\n<meta property=\"og:site_name\" content=\"ArcGIS Blog\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/esrigis\/\" \/>\n<meta property=\"article:modified_time\" content=\"2024-01-18T23:33:49+00:00\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:site\" content=\"@ESRI\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":[\"Article\",\"BlogPosting\"],\"@id\":\"https:\/\/www.esri.com\/arcgis-blog\/products\/arcgis-desktop\/imagery\/raster-pixel-editor#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.esri.com\/arcgis-blog\/products\/arcgis-desktop\/imagery\/raster-pixel-editor\"},\"author\":{\"name\":\"Kevin Butler\",\"@id\":\"https:\/\/www.esri.com\/arcgis-blog\/#\/schema\/person\/8691ab3666684108f926d34bbb97f082\"},\"headline\":\"Raster Pixel Editor\",\"datePublished\":\"2013-09-26T22:32:19+00:00\",\"dateModified\":\"2024-01-18T23:33:49+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.esri.com\/arcgis-blog\/products\/arcgis-desktop\/imagery\/raster-pixel-editor\"},\"wordCount\":3,\"publisher\":{\"@id\":\"https:\/\/www.esri.com\/arcgis-blog\/#organization\"},\"keywords\":[\"oceans and maritime\",\"raster\"],\"articleSection\":[\"Imagery &amp; 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