Multipolygons are not plotted on map from JSON but on Google Map works !

Question

Hi everyone!,

I am newbie working on ArcGIS, I was working with google maps days ago but I came across with the need to apply new feaute which Google Maps does not have. So I migrated my project to ArcGIS.
But Unfourtunally I got a problem:

1. I am trying to show polygons from JSON data. but no shape appear. The same JSON data from Google Maps is show.
2. I copy the JSON structure over an online Geometry Visualizer tool in order to find any problem, but the same problem persists no shape is shown neither.

Please, anyone may help me ASAP about this issue? what is the different between Google Maps and ArcGIS why does it work for one YES and the another NO ??  I attached JSON data as a zip file.

Thanks in advance!
Carlos

json-data-multipolygon.txt.zip

AlfredBaldenweck_2-1748031673631.png

derekswingley1 · Answer

Glad you got it working. To close the loop on this, here's a working example using the JS API:  http://dl.dropbox.com/u/2654618/multi-poly/map_full.html

PaulBushore · Answer

Glad to hear that Derek's answer helped you Carlos.  If you could, please take the time to mark Derek's post as the answer to the question, this lets other forum users know that the question has been answered.  On the right-side of his post there should be a spot where you can mark it as answered.

Best wishes!

CarlosEscobar · Answer

Hi Forum,

Thanks for supporting to me, I just solved the problem this one was made by using esri.geometry.geographicToWebMercator( shape )

The better for you.
Carlos
Can you post a screen shot of what your data looks like when added to a Google map? Posting the code to do so would also be helpful.

One thing I'd like to point out is that your data is in geographic coordinates (latitude and longitude) but you're probably using web mercator basemaps. We plan to simplify this, but until we do, you need to convert your geographic data to web mercator. You can use esri.geometry.geographicToWebMercator to do this.

Regarding specific support for multipolygons in the JS API, yes, they are supported. See a previous discussion I participated in on gis.stackexchange:  Esri JSON Polygon Ring Orientation.