Makatea Island FP with Contours
Makatea Island - Marplot Map with Contours North (1-31,250)
Makatea Island - Marplot Map with Contours South (1-31,250)
Makatea Island is an old project. It is also an island that generates alot of interest. I think the reason so many of my visitors view this island is because it is one of the few high islands within the Tuamotus.
Having recently discovered the ability to quickly create contours using SRTM data, I decided that Makatea Island could use contours. I downloaded the appropriate SRTM tile and loaded it into Global Mapper. I then zoomed into the island, selected "Create Contours", selected 20 meter intervals, pressed "Enter" and created the contours.
The contours created on the northern end of the island extended into the ocean. I had to reshape them to fit into the actural shorelines. It seems to be a problem with SRTM data. Or it could be a problem with footing SRTM data with Landsat ETM+ imagery. Seeing that 95% plus of the contours appear to be plotted where they might belong and the problem of contours extending into the ocean is typically located along a small portion of the shoreline the problem seems restricted. I really need to explore it in greater detail before I determine the causes of the problem.
The Maketea Island map with contours is good. Those of you that require contours for this island, know that I have them and will share them. Just drop me a line and I'll fix you up with any of the layers you might require.
Enjoy!
Labels: atoll, EVS, France, Global Mapper, island, Landsat, map, Marplot, Pacific, Polynesia, SRTM, Tuamotus
