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You can build a custom mercator projection centered approximately on the center of the swath. For example, use for swath 25: +proj=merc +lon_0=-140 +k=1 +x_0=0 +y_0=0 +ellps=WGS84 +towgs84=0,0,0,0,0,0,0 +units=m +no_defs In this projection, the swath is not broken by the dateline. You can create the polygon from the line. Then create a cut polygon ...


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I would rewrite the swathe line generation process to start and finish in the same continuous longintudinal space. ie if a line started at 170° and finished at -170° I would rewrite the process to finish at 190° instead without wrapping at -180,180 Then you can make unbroken polygons between your lines. Then use a clip process to split the polygons at the ...


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The sample record you show is in projected coordinates and the two values for longitude and latitude listed in the Coordinate Reference System (CRS) are part of the parameters that defined the projection that was used, here a particular Transverse Mercator projection that is called "SVY21 / Singapore TM" and is centered near Singapore. You can use the latest ...


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You have to change projection when saving the file to another format (TAB to Shapefile). Right-click the tab file -> go to save as, the following window will appear: In the red box, select the target projection here, then save the file to shapefile. If the output shapfile did not give you the desired results with a correct location, this means that the ...


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It's a known issue that pops up now and again with adding XY data that's been ongoing for years (see this ArcGIS Knowledge Base article): From section #3: There is a missing negative from the X field values when the values are decimal degrees (geographic coordinates). SOLUTION: Use the field calculator to add a negative to the X field's ...


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While Save As ... works easily with vector data, it is not useful to do raster reprojections with it. Instead, use Raster -> Projections -> Warp for reprojection, or Raster -> Convert -> Translate ... for a different file format. For large files, it might be better to use the OSGEO4W Command Shell. You can use gdalwarp or gdal_translate with ...



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