Pantabangan-Carranglan Watershed Landuse

Juan Carlos Gabriel Zacarias
Juan Carlos Gabriel Zacarias

September 23, 2024

Pantabangan-Carranglan Watershed Landuse

As part of an academic activity in my course "GEOG 124: Geographic Information Systems for Human Geographic Research" specifically our Exercise 5 Output, a landuse map with charts that show the share of each municipality in the Pantabangan-Carranglan Watershed and its different uses was submitted. This exercise teaches the geoprocessing workflow needed for processing, analyzing, and mapping spatial data.

  • Using QGIS styles (.qlr) files.

  • Using Web Map Tile Services (WMS) or XYZ Tiles.

  • Getting familiar with the Python Console, specifically to install XYZ Tiles.

  • Employ Geoprocessing Tools such as Dissolve to simplify boundaries and Intersection for determining the municipalities that have jurisdiction over parts of the watershed.

  • Operating the Field Calculator to convert 7 Landuse Classes to 3 Codes.

    • This included creating a new field, reclassifying fields (via CASE conditional operations), and generate area in hectares fields (via $area function).

  • Contribute to an existing SpatialLite database by saving and exporting layers.

  • Use Research tools to Select by location and Processing tools for Statistics by categories to calculate statistics of hectares by polygons.

  • Working with Plugins such as v.clean and DataPlotly.

    • Using the Expression String Builder to assign HTML notation colors to the bar chart and remap labels from numbers to descriptions.

    • Creating new charts, editing the Feature Subset Expression, and exporting the chart as an HTML file.

  • Applying learned techniques for designing maps in the Print Layout.

    • This includes locking layers, implementing inset maps, and inserting charts with an HTML source.


Plug-ins used

DataPlotlyGeoprocessing ToolsPythonWMS

tags

Area CalculationChartsGeoprocessingSpatial AnalysisWatershed

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