topic Re: How to create a polygon file based on a point grid file in Geoprocessing Questions https://community.esri.com/t5/geoprocessing-questions/how-to-create-a-polygon-file-based-on-a-point-grid/m-p/398979#M13540 <HTML><HEAD></HEAD><BODY><P>You want a concave hull, there used to be several, but <A href="https://community.esri.com/migrated-users/4811">Richard Fairhurst</A>​ 's toolset might just do the work for you</P><P><A href="https://community.esri.com/migration-blogpost/54704">Bruce Harold's Concave Hull Estimator Tool Enhanced</A> </P></BODY></HTML> Tue, 14 Jun 2016 22:48:16 GMT DanPatterson_Retired 2016-06-14T22:48:16Z How to create a polygon file based on a point grid file https://community.esri.com/t5/geoprocessing-questions/how-to-create-a-polygon-file-based-on-a-point-grid/m-p/398978#M13539 <HTML><HEAD></HEAD><BODY><P><BR />Hey, </P><P></P><P>I know this is going to be classified as GIS101, but I cannot for the life of me find a tool that will do what I require.</P><P></P><P>I have a point feature class, it has about 1 million points, it represents a flood area, and what I need to create is a polygon which represents the extent of the area affected by this flood. So basically I need it to 'shrink wrap' my points. See below my technical sample drawing, I am trying to create the extent (red) polygon, around the existing points (black dots).</P><P></P><P>What tool do I need???</P><P></P><P><IMG alt="Untitled.jpg" class="image-1 jive-image" src="https://community.esri.com/legacyfs/online/207755_Untitled.jpg" style="height: auto;" /></P></BODY></HTML> Tue, 14 Jun 2016 22:40:40 GMT https://community.esri.com/t5/geoprocessing-questions/how-to-create-a-polygon-file-based-on-a-point-grid/m-p/398978#M13539 BenVan_Kesteren1 2016-06-14T22:40:40Z Re: How to create a polygon file based on a point grid file https://community.esri.com/t5/geoprocessing-questions/how-to-create-a-polygon-file-based-on-a-point-grid/m-p/398979#M13540 <HTML><HEAD></HEAD><BODY><P>You want a concave hull, there used to be several, but <A href="https://community.esri.com/migrated-users/4811">Richard Fairhurst</A>​ 's toolset might just do the work for you</P><P><A href="https://community.esri.com/migration-blogpost/54704">Bruce Harold's Concave Hull Estimator Tool Enhanced</A> </P></BODY></HTML> Tue, 14 Jun 2016 22:48:16 GMT https://community.esri.com/t5/geoprocessing-questions/how-to-create-a-polygon-file-based-on-a-point-grid/m-p/398979#M13540 DanPatterson_Retired 2016-06-14T22:48:16Z Re: How to create a polygon file based on a point grid file https://community.esri.com/t5/geoprocessing-questions/how-to-create-a-polygon-file-based-on-a-point-grid/m-p/398980#M13541 <HTML><HEAD></HEAD><BODY><P>Thanks Dan, I am running the tool now to see if it does what I am looking for! </P><P></P><P>Cheers!</P></BODY></HTML> Wed, 15 Jun 2016 01:04:08 GMT https://community.esri.com/t5/geoprocessing-questions/how-to-create-a-polygon-file-based-on-a-point-grid/m-p/398980#M13541 BenVan_Kesteren1 2016-06-15T01:04:08Z Re: How to create a polygon file based on a point grid file https://community.esri.com/t5/geoprocessing-questions/how-to-create-a-polygon-file-based-on-a-point-grid/m-p/398981#M13542 <HTML><HEAD></HEAD><BODY><P>You could try <A href="http://desktop.arcgis.com/en/arcmap/10.3/tools/cartography-toolbox/aggregate-points.htm" title="http://desktop.arcgis.com/en/arcmap/10.3/tools/cartography-toolbox/aggregate-points.htm">Aggregate Points—Help | ArcGIS for Desktop</A> </P><P>Define a higher value for the aggregation distance, so that it forms a single polygon.</P></BODY></HTML> Wed, 15 Jun 2016 07:17:48 GMT https://community.esri.com/t5/geoprocessing-questions/how-to-create-a-polygon-file-based-on-a-point-grid/m-p/398981#M13542 JayantaPoddar 2016-06-15T07:17:48Z