The Maps Of The Week

Where Immigrants Live inwards Allegheny County is a scatterplot map of where Pittsburgh's immigrant communities alive inwards the city.

Each dot on the map represents 1 Pittsburgh resident. The dots are colored to demo the expanse of the basis where each citizen was born. The scatterplot points tin hold out filtered yesteryear percentage of beginning to break the areas of the urban kernel favored yesteryear dissimilar immigrant communities. For example, selecting only immigrants of Australian descent reveals that many Australian immigrants convey chosen to alive inwards the expanse to the westward of Bird Park.

The map was created alongside Mapbox too Leaflet.js. The scatterplot layer was created inwards QGIS using census data. If y'all are interested inwards learning to a greater extent than virtually how the map was created Databurgh has published a helpful tutorial on Building a Scatterplot Map inwards QGIS too TileMill.


The Texas Tribune has published a map showing the place of disposal wells where waste-water, oftentimes from hydraulic fracturing sites, is existence disposed of inwards the state. Texas Disposal Wells visualizes the place of 7,000 disposal wells inwards Texas.

The map uses hexagonal binning to highlight the issue of wells inside an area.. You tin zoom inwards on the map to sentiment the place of the private wells.

The Texas Tribune uses the Mapbox platform. Mapbox has written a overnice tutorial on how to purpose hexagonal binning alongside Mapbox created maps. Binning: an Alternative to Pointmaps explains how the complimentary too opened upwardly source QuantumGIS tool tin hold out used to exercise a hexagon density layer, which y'all tin thus overlay on elevation of a Mapbox map.


Newspapers responded to concluding week's European elections alongside a issue of election maps of the results. The map that I was most impressed alongside was yesteryear the Berliner Morgenpost. Europawahl 2014 Alle Stimmen inwards den 529 Berliner Wahlkiezen is a map showing the results of the European elections inwards each of Berlin's 529 election districts.

The map provides a uncomplicated visualization of the overall winners inwards each electoral district inwards Berlin yesteryear shading each district alongside the color of the winning party. If y'all click on an electoral district on the map y'all tin sentiment a breakdown of the results for each political party too y'all tin also compare the 2014 results alongside the votes cast inwards the district inwards the 2009 European Elections.

The visualization also uses an effective polygon knockout lawsuit to highlight Berlin on the map. If y'all desire to recreate this lawsuit alongside Google Maps y'all tin purpose Vasile Cotovanu's polygon masking wizard Geomask. Using Geomask it is possible to exercise a doughnut type polygon which alone shows the map through the hole inwards the doughnut polygon. The lawsuit of using Geomask is to highlight the relevant expanse on the map too mask the balance of the map.

Another effective blueprint chemical cistron of the map is that when y'all click on an electoral district on the map a employment is drawn from the district to the results inwards the map sidebar. It appears that the Berliner Morgenpost had discovered a slap-up method for drawing a polyline from the map to a static chemical cistron exterior the map.