Project with Transformation - where to get projection engine file?

WaldemarNowak — Fri, 22 May 2020 09:10:33 GMT

I try to use projection with specific transformation for bigger accuracy. In my case I need to convert from

WGS84 (WKID=4326)

EPSG:2229 NAD83 / California zone 5 (ftUS)

using the best transformation for Southern California:

NAD_1983_To_WGS_1984_southern_California_54 1750

The code should be simple:

// 1. Prepare transformation:
SpatialReference spCaliforniaNAD = new SpatialReference(2229);
GeographicTransformationStep geoStep = new GeographicTransformationStep(1750);
GeographicTransformation geoTransform = new GeographicTransformation(geoStep);
// 2. Transform myPoint into projected coordinate system:
MapPoint myPoint = new MapPoint(-117.82739800, 34.64073000, SpatialReferences.Wgs84);
MapPoint projectedPoint = (MapPoint)GeometryEngine.Project(myPoint, spCaliforniaNAD, geoTransform);

The problem is that both GeographicTransformationStep and GeographicTransformation have missing projection engine files (IsMissingProjectionEngineFiles==true). Of course it results with exception in the last line.

How can I get that missing projection engine file?

Thanks,

Waldek

Re: Project with Transformation - where to get projection engine file?

MichaelBranscomb — Fri, 22 May 2020 17:12:58 GMT

Hi,

Additional information on this file is included in Spatial references—ArcGIS Runtime SDK for .NET | ArcGIS for Developers.

Thanks

Mike

Re: Project with Transformation - where to get projection engine file?

WaldemarNowak — Sat, 23 May 2020 17:15:07 GMT

After following the documentation you indicated I was able to download Projection Engine Data Files and indicated them for transformation. It works.

Thank you.

topic Project with Transformation - where to get projection engine file? in .NET Maps SDK Questions

Project with Transformation - where to get projection engine file?

Re: Project with Transformation - where to get projection engine file?

Re: Project with Transformation - where to get projection engine file?