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In USA, I'm looking for outline of the Division 9 Pacific which consists of the following states:
Alaska California Hawaii Oregon Washington
I have got a map with the KML to generate for these states: https://drive.google.com/open?id=1lYAaPc-U3sv6hUlbhBsQJ0vzXfw&usp=sharing
But I just want the outline of the whole area and NOT the state borders. How can I get this?
If you're happy to try a new bit of software, I would suggest QGIS.
Load your KML, then go to Vector > Geoprocessing Tools > Dissolve
For the dissolve field, choose a field where all values are the same, and it will merge all adjacent polygons, removing the boundaries between them.
You can then save your new layer as a KML and re-upload.
