How To Visualize Location Data From A CSV File As A Choropleth Map In QGIS?
The most common type of theme map is a choropleth map. When geospatial data is linked to some enumeration units, they are extremely effective (Counties, provinces, districts, etc.). The distinct polygons inside a layer of a choropleth map have varying shades of colors signifying a specific property of that polygon (in our case, the number of locations). We’ll make a choropleth map for the United States, with each state’s color graded proportionately to its number of sites. The main steps for developing the Choropleth map are: • Importing the polygon vector map. • Importing the CSV file as a point vecto • Calculating the number of locations inside each state using the ‘Count points in’ tool. • Editing the symbol for getting the Choropleth map • Exporting map as an image or PDF. Importing Polygon Vector Map To create a Choropleth map, we must first obtain a country/region polygon vector map. A state in the United States is represented by each polygon in the vector map. Extra...