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?

  • Do you mean you want to merge them into a single polygon?
    – Matt
    Oct 5, 2016 at 7:58
  • @Matt - yes without the internal state borders.
    – dang
    Oct 5, 2016 at 8:05
  • @Matt - for ex. there is a border between California and Oregon which separates them, I don't need that specific piece. Just need a full outer outline.
    – dang
    Oct 5, 2016 at 8:06

1 Answer 1


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.

  • I will download qgis and let you know.
    – dang
    Oct 5, 2016 at 8:35
  • Is there a software which can show me all the lat, long and let me add/remove from KML?
    – dang
    Oct 5, 2016 at 8:36
  • 1
    Yes, QGIS will do all that for you.
    – Matt
    Oct 5, 2016 at 8:41
  • When I import KML to QGIS, it doesn't let me edit lat long points. How can I do that?
    – dang
    Oct 5, 2016 at 9:26

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