Making Interactive Maps From Spreadsheets Using Geosheets
Geosheets is a tool that allows for both mapping and querying to be done directly within Google Sheets by adding a suite of custom geospatial functions
Articles
Semi-Variogram: Nugget, Range and Sill
In the case of a semi-variogram, closer things have less variability and are similar. While things farther away are less predictable and are less related.
GeoDa Software – Data Exploration and Statistics at its Finest
While not necessarily your prototype GIS package, GeoDa carries exciting analytical & visualization tools in industries like economics, health & real estate
How to Create Flow Maps with Directional Lines
Cartographers use lines to show the movement of phenomenon in flow maps. To show the magnitude, they change the width of flow lines.
How To: Rasterization and Vectorization Conversion
Rasterization converts vectors into rasters. While vectorization transforms rasters in vectors. We explain how to go from one data model to the other.
TerraPop Environmental & Demographic Data
TerraPop delivers internationally comparable environment and demographic data at a global scale – this includes raster, area-level and micro-data.
Cartogram Maps: Data Visualization with Exaggeration
Cartogram maps distorts reality to convey information. It accomplishes this by resizing and exaggerating any variable using a polygons geometry.
What is a Voronoi Diagram?
In a Voronoi Diagram, when you take a point in any given Thiessen polygon, it indicates that it’s closer to that generating point than to any other.
Lossless Compression vs Lossy Compression
Lossless compression (like JPEG) retains values and lowers file size. However, lossy compression (like LZ77) reduces file size by eliminating redundancy.
Huff Gravity Model: Store Customer Predictions
Huff Gravity Model uses store size and distance along with census tract population to understand the probability that consumers will patron retail stores.