arcmap raster calculator con pick setnull

#ARCMAP RASTER CALCULATOR CON PICK SETNULL HOW TO#

The maximum length of the logical expression is 4,096 characters. You can consult the help for more information on specifying a query in Python.

In order to use a in Python, it should be enclosed in quotes. SQL reference for query expressions used in ArcGIS.I tried to use the expression: Con(('raster1' 1), ('raster2' + 1. See the following topics for more details on creating queries: So, I am trying to use the Con statement in ArcMap to add a certain value to a raster dataset (raster2) if the data is the same as an other dataset (raster1), if not I should just stay the same. If the conditional input is a multiband raster and the false raster input is a constant, the tool will perform the operation using the constant value for each band in the multiband input. The tool will perform the operation on each band from the conditional raster using the corresponding band from the other input. Con(IsNull('streams'), 0, 'streams') The tool supports the standard Map Algebra syntax that is used in Python scripting. The number of bands in each multiband input must be the same. The output raster will also be multiband if the false raster input is a constant. If both inputs are multiband rasters, the output will be a multiband raster. If the Input conditional raster ( in_conditional_raster in Python) is a single-band raster and the Input false raster or constant value ( in_false_raster_or_constant In Python) raster is a constant, the output will be a single-band raster. If it contains all integer values, the output will be an integer raster. If the input false raster (or constant value) contains floating-point values, the output raster will be floating point. Con (IsNull ('streams'), 0, 'streams') The tool supports the standard Map Algebra syntax that is used in Python scripting. The input conditional raster does not affect whether the output data type is integer or floating point. If no where clause is specified, the output raster will have NoData wherever the conditional raster is not 0. If the evaluation is false, the output raster will be defined by the input false raster or constant value. I have two raster 'T' and 'N' which have values ranging from 0 to 1000. Refer to How To: Automate setting null values of rasters to zero for more information.If the evaluation of the where clause is true, the cell location on the output raster will be assigned NoData. Optionally, use Python to automate setting NoData values to other values. When building expressions in the Raster Calculator tool, clicking and double-clicking the various layers, variables, buttons, and tool names on the dialog box will help you to avoid syntax errors that may otherwise be made while typing. The examples are shown below.īelow is an example of the statement to convert the NoData values to 0 for the Raster Calculator in 9.3:īelow is an example of the statement to convert the NoData values to 0 for the Raster Calculator in 10.x: However the Raster Calculator may also be used to call the Con and IsNull tools to perform the same task. In both versions 10.x and 9.3, the Con tool can be used outside of the Raster Calculator to create a new raster with reset NoData (Null) values.

Alternatively, use the Raster Calculator tool to call the Con and IsNull tools to use them to change NoData values to other values.

#ARCMAP RASTER CALCULATOR CON PICK SETNULL HOW TO#

Refer to ArcMap: How to change NoData cells to a value for more information. One option is to use the Con tool in conjuction with the IsNull tool from the Spatial Analyst toolbox to convert NoData values. Since NoData cells are ignored in any analysis, such requirements can only be met if those cells have a specific value assigned to them.ĪrcGIS offers a couple options to convert NoData values to another constant, such as zero. Learn more about setting cell values to NoData with Set Null. It returns NoData if a conditional evaluation is true, and returns the value specified by another raster if it is false. Various spatial analysis applications require raster NoData cells to be factored into an analytical operation. Set Null sets identified cell locations to NoData based on a specified criteria.

Arcmap raster calculator con pick setnull