7/25/2023 0 Comments Using gif overlay on gimpSo the area you can cover with this kind of map is far more limited than it is for the original topographic overlay file, which uses tiling to get around those limitations.Īnother use for transparency is to add your own descriptive raster graphic images to a Google Earth view, to highlight or label important features. Image overlays of this sort can use lots of memory and system resources Google recommends no larger than 2000 x 2000 pixels. Save it as a KMZ file if you want to use it again. … with the topo map features visible, but the aerial photography unobscured by the blank areas of the map. Load it into Google Earth as an image overlay, position it properly, and instead of the first image above I get this … … I can run it through IrfanView (described in this post), and save it as a GIF with white as the transparent color. But if I have a topo map for this same area … The biggest drawback is that the topo map image completely covers up the underlying aerial photography even if I make the topo overlay partially transparent, the aerial view would still be partially obscured. Here’s a screen shot using a topo map overlay: There are a number of topographic map overlays for Google Earth search this blog for examples. ![]() But there are lots more ways to use transparent colors with image overlays to give you extra freedom in adding graphics to Google Earth here are two examples. In the last post, GIF/PNG transparent colors were used to improve the appearance of Google Earth image overlays showing sea level rise flooding.
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