topic Re: Stereographic Polar projection in ArcGIS JavaScript Maps SDK Questions

Stereographic Polar projection

ZeinaNassar — Wed, 28 Nov 2012 16:46:54 GMT

Any existing js / API to generate polar projection (stereographic) of a map?

Re: Stereographic Polar projection

JohnGravois — Thu, 29 Nov 2012 17:31:38 GMT

here is a list of projected coordinate system IDs...

what do you mean "generate" a projection of a map? typically we use the JS API to refer to a map service that already has a predefined coordinate system. ArcGISDynamicMapServiceLayers can reproject on the fly. ArcGISTiledMapServiceLayers cannot.

you can use a geometry service to reproject a feature, if you're trying to do something else it would be helpful if you could provide some more specific details.

Re: Stereographic Polar projection

ZeinaNassar — Thu, 29 Nov 2012 17:38:40 GMT

Thank you for the prompt reply. What I meant is that I am already using google maps API v3(mercator projection) to map lat/long positions. However this projection does not represent the points at the polar areas (North and South). Therefore, it would be helpful to have a polar projection to represent these polar locations (i.e. http://w4.jcommops.org/website/DBCPS/viewer.htm ) I was wondering of any implementation of such projection using javascript.
Thank you again.

Re: Stereographic Polar projection

ZeinaNassar — Thu, 29 Nov 2012 17:39:20 GMT

Re: Stereographic Polar projection

JohnGravois — Thu, 29 Nov 2012 17:45:09 GMT

i couldn't really speak intelligently about the Google Maps API, but using our JavaScript API it would be a pretty simple task to publish a map service with a polar projection and display it in a web application as either a cached or dynamic map service layer.

Re: Stereographic Polar projection

ZeinaNassar — Thu, 29 Nov 2012 17:56:06 GMT

Thank you again. As I am a newbie to arcGIS map service, can you please advise on references that I can look at in order to implement the polar projection.
Regards .

Re: Stereographic Polar projection

JohnGravois — Thu, 29 Nov 2012 18:06:58 GMT

no worries! 🙂

specifying the projection for the map is something you do in our desktop software before you even publish a map service, so here are some links to our Desktop and Server help...

once you have a service up and running, you should be able to build a simple javascript app like this sample.

Re: Stereographic Polar projection

derekswingley1 — Thu, 29 Nov 2012 18:17:26 GMT

If you're using an ArcGIS Server service that can be projected on the fly(dynamic map service, feature service, image service) then ArcGIS Server can project your data into any projection. Here's an example of projecting the World Population Service to Arctic Polar Stereographic: http://sampleserver1.arcgisonline.com/ArcGIS/rest/services/Demographics/ESRI_Population_World/MapServer/export?bbox=-12279634.13210453%2C-3847513.08889383%2C10591278.152258359%2C5481664.75628363&bboxSR=3995&layers=&layerdefs=&size=1189%2C485&imageSR=3995&format=png24&transparent=false&dpi=96&time=&layerTimeOptions=&f=html

And here it is being used in a simple JS API page: http://jsfiddle.net/usst7/

Re: Stereographic Polar projection

ZeinaNassar — Sun, 02 Dec 2012 22:42:12 GMT

Thank you all for the replies.
Just to confirm, in order to be able to get this projection running, we need to use ArcGIS desktop software, charges apply to get such software, correct?
Thank you.

Re: Stereographic Polar projection

derekswingley1 — Mon, 03 Dec 2012 13:50:53 GMT

Thank you all for the replies.
Just to confirm, in order to be able to get this projection running, we need to use ArcGIS desktop software, charges apply to get such software, correct?
Thank you.

Yes. You would publish an ArcGIS Server service via ArcGIS Desktop. Neither is free.