Modifying the attribute table in QGIS | UPV
Title: Modifying an Attribute Table in QGIS
Description: This Learning Object shows the options available for modifying the structure and content of fields in a spatial table using QGIS. Coll Aliaga, PE. (2021). Modifying an Attribute Table in QGIS. http://hdl.handle.net/10251/168084
Automatic Description: In this video, the presenter teaches how to work with attribute tables using GIS software called "coxis." It demonstrates how to modify geospatial data structures, specifically a layer of cadastral blocks. The video begins by importing a GML layer and discovering that it contains an incorrect polygon. The layer is then cleaned, retaining only the blocks, and subsequently exported to a geopackage format.
Next, the presenter teaches how to delete unwanted records directly from the attribute table and how to use tools to edit these attributes. It demonstrates how to reorganize columns, make fields invisible, and calculate values. It also explains how to change the field type of an attribute, from integer to text and from integer to double, adjusting the required length and precision for certain fields.
Finally, it demonstrates how to recalculate the 'x' and 'y' coordinate positions using the software's field calculator. These positions are recalculated by extracting the desired values from a text field. The video concludes by showing that a layer with correctly structured attributes, modified according to the needs for processing cadastral data, is now available.
Author: Coll Aliaga Peregrina Eloína
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#Spatial table #Geographic attributes #QGIS #GIS #Cartographic Engineering #Geodesy and Photogrammetry