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====== ThinkGeo Cloud Elevation ======
ThinkGeo Cloud Elevation provides the way to get elevation data from ThinkGeo GIS Server. Check out [[https://samples.thinkgeo.com/cloud/#GetElevationAlongPath|Get Elevation Along Path]] for a quick look.

The Elevation SDK support query elevation data by points, line and polygon based on SRTM and Ned13 elevation source data. And it return 3 types data:
  * For point - Create a buffer and aggregate all points within buffer to create average for the elevation of the point.
  * For line - There are two ways to get the elevation data of the line. First, get the points on the line by setting the interval distance. The other, is to take the points by setting the number of points to be fetched. Then query the elevation data of the point.
  * For polygon - By setting the interval distance, clip the polygon to the grids and get all the center of the grids where the polygon is located. Now, determine whether the center points are within the surface or inside the surface (use improved arc-length method).

===== RESTful APIs =====

* //**Try it Online**:// All the ThinkGeo Cloud RESTful APIs can be tested online following the instructions below: 
  *  Get a ThinkGeo Cloud Client Key. Check out [[https://wiki.thinkgeo.com/wiki/thinkgeo_cloud_client_keys_guideline|ThinkGeo Cloud Client Keys Guideline]] see how to apply one. It's free for 60 days.  
  *  //** **// Authorize with the key at the top of [[https://cloud.thinkgeo.com/help/|ThinkGeo Cloud APIs]] and you are then free to play with all the APIs online. 

//**ThinkGeo Cloud Elevation provides the following RESTful APIs**://
<code html>
<!-- Get the elevation of a point -->
HTTP GET
https://cloud.thinkgeo.com/api/v1/elevation/{pointY},{pointX}
</code>

//**Parameters**//
  * //**pointY**//: __Required__. The Y coordinate of the point.
  * //**pointX**//: __Required__. The X coordinate of the point.


  *  Hit //**Try it Out**// button below [[https://cloud.thinkgeo.com/help/#/Elevation/GetElevationOfPointV1|GetElevationOfPoint]] to test it online. 

===== Consume From Client Side SDKs =====

A .Net SDK //ThinkGeo Cloud Client// is provided to consume the ThinkGeo Cloud Service as well. It's available on [[https://www.nuget.org/packages/ThinkGeo.GisServer.Client|NuGet]], here is the complete [[thinkgeo_cloud_.net_client_apis|API List]]. 

Sample Code: 
<code csharp>
ElevationClient elevationClient = new ElevationClient(clientId, clientSecret);
elevationClient.BaseUris.Add(new Uri(GisServerUri));
var response = elevationClient.GetElevationOfLineAsync(line, 3857, numberOfSegments: pointNumber, elevationUnit: DistanceUnit.Meter);
</code>

Native SDKs for //Python//, //iOS// and //Android// are coming soon. 

===== Samples =====

Online Sample:
  * [[https://samples.thinkgeo.com/cloud/#GetElevationAlongPath|ThinkGeo Cloud Elevation Online Sample]]

Desktop Sample:
  * [[https://github.com/ThinkGeo/ElevationStatisticsSample-ForWpf]] for [[map_suite_desktop_for_wpf|Map Suite Desktop For WPF]]
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