topic Re: Best projection for south-east Asia in Mapping Questions https://community.esri.com/t5/mapping-questions/best-projection-for-south-east-asia/m-p/587722#M6429 <HTML><HEAD></HEAD><BODY><P>How accurately do you need distances to be?</P><P>What is the areal extent being covered?</P><P>What projections are normally used for your area, particularly compromise projections?</P><P>Are you comparing distances relative to one another?</P><P></P><P>In short the answer to some or all of those questions will provide guidance</P></BODY></HTML> Tue, 08 Dec 2015 16:30:08 GMT DanPatterson_Retired 2015-12-08T16:30:08Z Best projection for south-east Asia https://community.esri.com/t5/mapping-questions/best-projection-for-south-east-asia/m-p/587721#M6428 <HTML><HEAD></HEAD><BODY><P>Hi all,</P><P></P><P>I am struggling to choose a best projection for South east Asia's karst map. I wanted to calculate the Euclidean distance and I am not quiet sure about which projection I should use to preserve distance.</P><P></P><P>Look forward to hearing from you...Thanks in advance...</P><P></P><P>Parvathy </P></BODY></HTML> Tue, 08 Dec 2015 15:39:09 GMT https://community.esri.com/t5/mapping-questions/best-projection-for-south-east-asia/m-p/587721#M6428 parvathyVenugopal 2015-12-08T15:39:09Z Re: Best projection for south-east Asia https://community.esri.com/t5/mapping-questions/best-projection-for-south-east-asia/m-p/587722#M6429 <HTML><HEAD></HEAD><BODY><P>How accurately do you need distances to be?</P><P>What is the areal extent being covered?</P><P>What projections are normally used for your area, particularly compromise projections?</P><P>Are you comparing distances relative to one another?</P><P></P><P>In short the answer to some or all of those questions will provide guidance</P></BODY></HTML> Tue, 08 Dec 2015 16:30:08 GMT https://community.esri.com/t5/mapping-questions/best-projection-for-south-east-asia/m-p/587722#M6429 DanPatterson_Retired 2015-12-08T16:30:08Z Re: Best projection for south-east Asia https://community.esri.com/t5/mapping-questions/best-projection-for-south-east-asia/m-p/587723#M6430 <HTML><HEAD></HEAD><BODY><P>Hi Dan,</P><P></P><P>I am not quiet sure whether I can answer all your queries. Well, I am preparing layers to use them in MaxEnr for modelling. Normally people use Lambert Conformal Conic projections, I think. Yes, I would like to compare the distances because basically I would like to know how my species are distributed in relation to these carbonic rocky areas. The same I would like to find for waterways and roads in my study area.</P><P></P><P>Apologies if my answer is insufficient.</P><P></P><P>Thank you...</P></BODY></HTML> Tue, 08 Dec 2015 17:35:43 GMT https://community.esri.com/t5/mapping-questions/best-projection-for-south-east-asia/m-p/587723#M6430 parvathyVenugopal 2015-12-08T17:35:43Z Re: Best projection for south-east Asia https://community.esri.com/t5/mapping-questions/best-projection-for-south-east-asia/m-p/587724#M6431 <HTML><HEAD></HEAD><BODY><P>The <A href="http://desktop.arcgis.com/en/desktop/latest/tools/analysis-toolbox/generate-near-table.htm" title="http://desktop.arcgis.com/en/desktop/latest/tools/analysis-toolbox/generate-near-table.htm">Generate Near Table—Help | ArcGIS for Desktop</A> could be used for calculating the distances, if the results from using a LCC projection weren't sufficiently accurate for your purposes.&nbsp; An equidistant projection wouldn't apply to all locations either if memory serves.&nbsp; So I would go with mapping using a projection that people are familiar with seeing and doing distance calculations using other means if the results from the LCC projected data weren't deemed to be accurate enough ... although I am sure they would be fine. We use LCC in Canada because of our large EW extent and when projected systems traverse several UTM zones...our normal fall-back</P></BODY></HTML> Tue, 08 Dec 2015 19:09:12 GMT https://community.esri.com/t5/mapping-questions/best-projection-for-south-east-asia/m-p/587724#M6431 DanPatterson_Retired 2015-12-08T19:09:12Z Re: Best projection for south-east Asia https://community.esri.com/t5/mapping-questions/best-projection-for-south-east-asia/m-p/587725#M6432 <HTML><HEAD></HEAD><BODY><P>Thank you so much Dan...I will follow your suggestions ... </P></BODY></HTML> Wed, 09 Dec 2015 14:18:42 GMT https://community.esri.com/t5/mapping-questions/best-projection-for-south-east-asia/m-p/587725#M6432 parvathyVenugopal 2015-12-09T14:18:42Z