Hot answers tagged projection-conversions
Firstly, it's not necessary to project the data to webmercator, since tilemill can project on the fly. But if you have a large dataset, then it helps to have data in WebMercator. You should note that according to the KML standard, the KML data can only be in WGS84 Latlong, i.e. EPSG:4326. Hence we'll have to project this data to some other format. If you ...
Use the gdalwarp utility. gdalwarp -s_srs epsg:4326 -t_srs epsg:3857 input.tif output.tif
I have constructed below a well-known text (WKT) file for the projected coordinate system that your data is using. You should copy it to a text file that has an extension ".prj". The WKT string must be a single line. Put the text file into your ArcGIS installation folder, then "Coordinate Systems, Projected Coordinate Systems". When you want to project your ...
You should modify the table, by adding 4 fields: x1, y1, x2, y2 or similar. Now do table update: x1=objectnodex(obj,1,1) y1=objectnodey(obj,1,1) For the end it is a little trickier: x2=objectnodex(obj,1,objectinfo(obj,22)) y2=objectnodey(obj,1,objectinfo(obj,22)) The above only works with polylines, not lines. Since the default coordsys is wgs84, you ...
As per this forum post, I would try: Checking your environment settings (extents, etc.) Checking that you have chosen the correct transformation in the project raster tool.
Use EPSG:3857. That is the official EPSG code number for Google mercator projection. 900913 was incorproated in GDAL some toime ago, but is now dropped in favour of 3857.
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