topic Re: Grid resolution and terrain analysis in ArcGIS Online Questions https://community.esri.com/t5/arcgis-online-questions/grid-resolution-and-terrain-analysis/m-p/611208#M30522 <HTML><HEAD></HEAD><BODY><P>You mention you&nbsp;have a shapefile (<SPAN style="background-color: #ffffff;">contours_area.shp). If would be better to import the shapefile into a file geodatabase. When you import it into a FGDB the system will automatically manage a field called Shape_Length. You can use simple field statistics to obtain the sum of&nbsp;all the lengths.&nbsp;If you don't want to or cannot load your shapefile into a FGDB, you can use&nbsp;<A class="link-titled" href="http://desktop.arcgis.com/en/arcmap/latest/tools/data-management-toolbox/add-geometry-attributes.htm" title="http://desktop.arcgis.com/en/arcmap/latest/tools/data-management-toolbox/add-geometry-attributes.htm">Add Geometry Attributes—Help | ArcGIS Desktop</A>&nbsp;</SPAN></P></BODY></HTML> Wed, 21 Mar 2018 17:57:51 GMT XanderBakker 2018-03-21T17:57:51Z Grid resolution and terrain analysis https://community.esri.com/t5/arcgis-online-questions/grid-resolution-and-terrain-analysis/m-p/611207#M30521 <HTML><HEAD></HEAD><BODY><P>Hi there!&nbsp;</P><P>I want to calculate the ideal grid size for a contours_area.shp layer.&nbsp;</P><P>I will use one of Hengl's formula for calculating grid resolution.</P><P>To get the grid resolution the area <STRONG>Hengl's formula states that I&nbsp;should divide the total size of the study area and</STRONG><BR /><STRONG>the total cumulative length of all digitized contours.</STRONG></P><P><STRONG>How do I determine the&nbsp;total cumulative length of all digitized contours?&nbsp;</STRONG></P></BODY></HTML> Wed, 21 Mar 2018 17:51:33 GMT https://community.esri.com/t5/arcgis-online-questions/grid-resolution-and-terrain-analysis/m-p/611207#M30521 nolumanyanocamagu 2018-03-21T17:51:33Z Re: Grid resolution and terrain analysis https://community.esri.com/t5/arcgis-online-questions/grid-resolution-and-terrain-analysis/m-p/611208#M30522 <HTML><HEAD></HEAD><BODY><P>You mention you&nbsp;have a shapefile (<SPAN style="background-color: #ffffff;">contours_area.shp). If would be better to import the shapefile into a file geodatabase. When you import it into a FGDB the system will automatically manage a field called Shape_Length. You can use simple field statistics to obtain the sum of&nbsp;all the lengths.&nbsp;If you don't want to or cannot load your shapefile into a FGDB, you can use&nbsp;<A class="link-titled" href="http://desktop.arcgis.com/en/arcmap/latest/tools/data-management-toolbox/add-geometry-attributes.htm" title="http://desktop.arcgis.com/en/arcmap/latest/tools/data-management-toolbox/add-geometry-attributes.htm">Add Geometry Attributes—Help | ArcGIS Desktop</A>&nbsp;</SPAN></P></BODY></HTML> Wed, 21 Mar 2018 17:57:51 GMT https://community.esri.com/t5/arcgis-online-questions/grid-resolution-and-terrain-analysis/m-p/611208#M30522 XanderBakker 2018-03-21T17:57:51Z