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I have a TIFF containing soil moisture values in each cell and I have a point shapefile with only 50 points of field measurements.
How can I make a scatterplot of these 2 datasets? I know I can convert my raster into Excel files and do the comparison in Excel. Using Arcmap, how can I compare the 50 shapefile points with the underlying cells of the raster?
You'll want to extract the raster value for each corresponding point. You can use the Extract Values to Points tool. From the documentation:
Extracts the cell values of a raster based on a set of point features and records the values in the attribute table of an output feature class.
If you want to create a scatterplot in ArcMap, you can go to View > Graphs > Create Graph... and select the output from the tool mentioned above as the Layer/Table. More information about creating a Scatterplot in ArcMap can be found here.
