The value of the lake raster represents the minimum value of the dem within that lake. If you multiply the raster by 1.0 with the raster calculator, ArcMap will recognize the NoData values. Hi, I have a dem, and a series of lakes in raster format. It can be used for processing the remaining selected cells, to create a mask, or to eliminate certain cells for future consideration within a model. I have a GeoTIFF raster in ArcGIS Desktop, which can be downloaded from the following two links. Similarly, Set Null is often used to change all values that meet a specified condition to NoData. In particular, the logical tools in the Math toolbox can be used, with the Test tool being particularly useful. To go from no data to zero, enter NoData in the old value field, and enter a. The best part is that you can reclassify a range of values. Use the raster calculator to construct a binary raster which can be symbolized as blue or transparent and overlain on the bedrock elevation map. This tool allows you to change old raster values to new raster values. This tool also requires the spatial analyst extension in ArcGIS. A cell containing NoData as input does not equate to false, and NoData will be assigned as the output for the location.Ī number of Spatial Analyst tools can be used to identify which cell locations will be evaluated to true and which to false. You can convert no data to zero by using the Reclassify Tool. Cells evaluating to true will receive NoData as output. If only an input raster is used, all nonzero values on the input raster are considered true and all zero values false. There are two ways in geoprocessing to identify whether a cell location evaluates to true or false: by an input conditional raster or by an input conditional raster on which an optional expression is applied. The fastest way to convert NoData value to 0 in ArcGIS is to use map algebra with the Con operator Con(IsNull(yourraster), O, yourraster) Now if you want to avoid creating those NoData values when you extract some values and there is no simple conversion rule, you can use the 'reclassify tool' making sure that you have an output value (which. The tool returns NoData for an output cell if the evaluation on an input conditional raster is true otherwise, it returns the value identified by the false input, which can be a raster or a constant value. (You should just be able to use your original raster as the mask) Step 3, run the Nibble tool. This identifies the areas to be filled (NoData). The Set Null tool sets identified cell locations to NoData based on a specified criterion. You could use the following raster calculator statement to generate an input: Con (IsNull ('yourraster'),0,'yourraster') Step 2, create a Nibble mask.
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