General : Field calculator can be used to update feature's geometry General : Virtual layers General : Zoom to feature with right-click in attribute table General : Speed improvements General : More expression variables General : New expression functions in 2.14 General : Better control over placem...
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In theField calculatordialog, selectus_states_with_populationas theInput layer. Enterdensityas theField name. Enter the following expression to compute the density. As the functionarea(@geometry)calculates the area in the unit of the CRS (which is in meters), we apply the conversion factor to...
That field should now be set to Not set. This is important because when raster calculator (which we will use later) encounters a pixel with nodata value in any layer, it sets the output to nodata as well, resulting is wrong output. Scroll down to find the Advanced Parameters and select...
We displayed the attribute table, created a new field linked to the annual lateral migration rate, and used the “Field Calculator” tool. We divided the width value for each DGO by the difference in years between the two centerlines (T1 vs. T2) and multiplied the result by the ...
Selection by location has been improved with its interactive selection tool. When records are selected, they can be filtered even more so (selected from, added to, removed from). The field calculator supports Python and VB to execute code. ...
as they do not account for factors such as land use, pollution, temperature etc. However, this simple set of criteria will suffice as a means for you to gain familiarity with some of the important basic tools of QArcGIS. Overview of tasks The data sets for this practical will be two of...
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General : Field calculator can be used to update feature's geometry General : Virtual layers General : Zoom to feature with right-click in attribute table General : Speed improvements General : More expression variables General : New expression functions in 2.14 General : Better control over placem...
In the Field calculator dialog, select NST-EST2023-ALLDATA as the Input layer. Enter GEOID as the Field name and set the Result field type to Text (string). We will now take the numbers from the STATE field and use the lpad() function to create a 2-digit 0-padded string. Enter the...