Category Archives: Tips

PostGIS How-to: NetCDF to PostGIS

Disclaimer: I am not sure if this is the quickest way of importing NetCDF files to PostGIS, but it works, and for me that is the most important. If you have any other suggestions for improvements, please post them in … Continue reading

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PostGIS How to: Calculate the average raster pixel value inside a polygon

In my daily work I use both vector and raster data and the combination of both. Often, I want to include raster data into our common vector grid. Hence, I often want averaged raster pixel values inside each of the … Continue reading

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Natural Earth – Free Raster and Vector Data

Somewhat unfamiliar to me is the Natural Earth project, providing free raster and vector data of administrative borders, disputed areas, populated places, urban polygons and water boundaries in addition to much more. Great for updated maps. For historical shapefiles. Check … Continue reading

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FME – Raster to polygon

The last couple of weeks i have been working on a raster to vector conversion in FME, and thought it would be nice to share my experiences here at my blog. This might be the start to a FME special … Continue reading

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Environmental Performance Index 2010

CIESIN and Yale University has released the 2010 data of their data set on environmental performance index. GisIntersect has created a map from the dataset, available here Click the map for full size:

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Historical state boundaries – cShapes

Nils Weidmann at Princeton University and Kristian Skrede Gleditsch at the University of Essex has constructed this historical border dataset. The cShapes package includes all state border changes from 1946 and onward. It provides an excellent dataset to visualize border … Continue reading

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Free maps and baselayers

ArcGIS online resources center provides some very interesting basemaps for free. If you only need some background maps to visualize your information on, then this is a good solution. The service includes both basemaps, reference maps and elevation maps. There … Continue reading

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