Digital Elevation Model is very important dataset for carrying out many geospatial analysis, especially in processes like Hydrology. There are free DEMs available online for the benefits of researchers thanks to organizations like NASA and ISRO. However the freely available DEMs generally have a spatial resolution of 30 meters or more. For many applications we might need higher resolution.
Interpolation predicts values for cells in a raster from a limited number of sample data points. It can be used to predict unknown values for any geographic point data: elevation, rainfall, chemical concentrations, noise levels, and so on.
Here I have just interpolated the values of the DEMs and created a higher resolution DEM. In this example I have increased the resolution of the DEM from 30 meter to 10 meter. You can follow the video and get your high resolution DEM. However there are certain disadvantages, to do watch the video completely to understand the theory behind it and also the disadvantages.
Here is the video
Note and Tips:
- The accuracy of the result will not be as good as the accuracy of the original 10 meter resolution DEM.
- Try to understand different types of interpolation techniques, so that you can choose the best interpolation technique suitable to you.
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