Latest Contributions by MichaelBucari-Tovo

I made a scale bar for my android app using Line.calculateLength2D() and GeometryEngine.distance() (both return the same value), but the value returned does not match distances measured on a physical map using a scale nor google earth's measurements.  The points I used to measure were: Point bottomLeft = MapView.toMapPoint(0, MapView.getHeight()); Point bottomRight = MapView.toMapPoint(MapView.getWidth(), MapView.getHeight()); I also used MapView.getExtent() which gave the same result. Polygon extent = MapView.getExtent(); Point bottomLeft = extent.getPoint(0); Point bottomRight = extent.getPoint(1); I was testing this with the world imagery tile service at zoom level 15.  I noticed that wherever I was on earth, the measurement of my screen width was ALWAYS 1032m.  I measured the real distance using google earth, and found that the real distance matches ArcGIS's calculateLength2D() value at the equator, but it gets progressively smaller as latitude increases.  On a hunch, I tried multiplying the calculateLength2D() value by the cosine of the latitude, and it worked.  The product matched google earth measurements at all latitudes. I'm not sure if this is a bug or working as intended. What's the use of calculateLength2D() and distance() if their output is only valid at the equator? ... View more

I'm creating a field mapping app.  Many of the places where this app will be used will not have cell service, so I'll need to be able to cache map tiles.  I downloaded and ran the sample app from ESRI  https://developers.arcgis.com/android/sample-code/export-tile-cache/ It works with the sample map service, but it does NOT work with any of the services from this page :  http://services.arcgisonline.com/arcgis/rest/services isExportTilesAllowed() returns true for the sample service layer, but false for the real services.  So do I need to license my app to be allowed to cache the other services, or are those services not allowed to be cached at all? Thank you, Michael ... View more