topic Re: Is WKID only in ESRI products? in ArcGIS JavaScript Maps SDK Questions

Is WKID only in ESRI products?

LouieRowley — Fri, 03 Apr 2015 22:59:03 GMT

Is the WKID associated a spatial reference from a Standard or is that unique to ESRI products?

Re: Is WKID only in ESRI products?

DanPatterson_Retired — Sat, 04 Apr 2015 00:20:59 GMT

Pertinent and important reading...so that you are sure that everything is right

ArcGIS Help (10.2, 10.2.1, and 10.2.2)

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Re: Is WKID only in ESRI products?

JeffJacobson — Mon, 06 Apr 2015 16:27:30 GMT

Generally, no. There's a group called EPSG that standardizes these. (You can look them up on epsg.io.)

However, it is possible for Esri or others to define their own spatial reference systems and assign their own numbers, too.

For example, Google defined a coordinate system and gave it an ID of 600613. (The digits resemble the letters in the word "GOOGLE".) Later, this was adoped by Esri and they gave it the ID of 102100. It eventually became an EPSG standard with the ID of 3857. Older versions of ArcGIS Server would only recognize 102100, but once the EPSG assigned it an ID of their own, newer versions would recognize 3857 as well as the deprecated 102100.

Re: Is WKID only in ESRI products?

LouieRowley — Mon, 06 Apr 2015 16:27:45 GMT

Interesting stuff, European Petroleum Survey Group (EPSG) Background .

Thank you for the links.