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Tobler’s Law: Critical Questions to Ask

Tobler’s first law of geography (TFL), that near things are more related to each other than distant things*, is employed in spatial models used to demonstrate, explain, and predict phenomena. The law...

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Friday Resources

You can download SF 1 Census data, with all the states compiled into a single geodatabase, from a relatively new “blog + extras” site called gisnuts.com. They get bonus points for the GIS quips in the...

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Pairwise Primer

Note: This is a really basic primer that completely leaves out all the math behind this technique. I built a spreadsheet that does all the calculations several years ago that you could modify. Ask me...

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In Our Defense

I bill myself as a data scientist. After all, 50% of any GIS or cartography project, in general, involves data wrangling. Knowledge of statistics and geo-specific analytics is imperative to getting...

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Creating an Aspect-slope Map in GeoServer

An aspect-slope map (sometimes called a slope-aspect map) is an overlay of a semi-transparent slope map on top of an aspect map that is styled with a unique hue for every 45 degrees of slope direction....

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