topic How to merge polygons without changing size(ha) calculation/ calculate density per urban green space/ etc in Community Development Questions https://community.esri.com/t5/community-development-questions/how-to-merge-polygons-without-changing-size-ha/m-p/779263#M15 <HTML><HEAD></HEAD><BODY><P>Hi,</P><P></P><P>I'm doing a spatial analysis of&nbsp;areas that need more green space in order to meet certain criteria:</P><P>- at least 1 x 2ha in size, less than 300m from home</P><P>- at least 1 x 20ha site within 20km&nbsp;<SPAN>from home</SPAN></P><P>- 1 x 100ha site within 5km from home</P><P>- 1 x 500ha site within 10km from home</P><P>- minimum 1 local nature reserve per thousand population</P><P></P><P>I have all the shape files for the green space,&nbsp;road networks, population per area (census data) (has raster and vector merged with the area polygons)</P><P></P><P>So I have a few Q's:</P><P>1. What's the best tool to use to integrate overlapping polygons&nbsp;accurately so that you can still calculate correct size(ha) (i have some green space polygons from different sources that overlap that I want to merge)</P><P>2.&nbsp;How on earth do I determine the criteria:&nbsp;<SPAN>minimum 1 local nature reserve per thousand population? kernel density? just not sure how to use that tool (still&nbsp;very much a GIS newbie)</SPAN></P><P></P><P><SPAN>Thank you!</SPAN></P></BODY></HTML> Mon, 16 Dec 2019 17:38:56 GMT Anonymous User 2019-12-16T17:38:56Z How to merge polygons without changing size(ha) calculation/ calculate density per urban green space/ etc https://community.esri.com/t5/community-development-questions/how-to-merge-polygons-without-changing-size-ha/m-p/779263#M15 <HTML><HEAD></HEAD><BODY><P>Hi,</P><P></P><P>I'm doing a spatial analysis of&nbsp;areas that need more green space in order to meet certain criteria:</P><P>- at least 1 x 2ha in size, less than 300m from home</P><P>- at least 1 x 20ha site within 20km&nbsp;<SPAN>from home</SPAN></P><P>- 1 x 100ha site within 5km from home</P><P>- 1 x 500ha site within 10km from home</P><P>- minimum 1 local nature reserve per thousand population</P><P></P><P>I have all the shape files for the green space,&nbsp;road networks, population per area (census data) (has raster and vector merged with the area polygons)</P><P></P><P>So I have a few Q's:</P><P>1. What's the best tool to use to integrate overlapping polygons&nbsp;accurately so that you can still calculate correct size(ha) (i have some green space polygons from different sources that overlap that I want to merge)</P><P>2.&nbsp;How on earth do I determine the criteria:&nbsp;<SPAN>minimum 1 local nature reserve per thousand population? kernel density? just not sure how to use that tool (still&nbsp;very much a GIS newbie)</SPAN></P><P></P><P><SPAN>Thank you!</SPAN></P></BODY></HTML> Mon, 16 Dec 2019 17:38:56 GMT https://community.esri.com/t5/community-development-questions/how-to-merge-polygons-without-changing-size-ha/m-p/779263#M15 Anonymous User 2019-12-16T17:38:56Z