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It would take very little tweaking: approximate the polygon boundary by isothetic lines (that is, horizontal and vertical segments) and, as initial conditions, place boxes (with blank content) aligned …

Quick and dirty way: create a polygon for the complement of the region to be shown (by subtracting the region from a large rectangle, for instance). Draw this polygon over the raster. Better: the st …

Environmental investigations are inherently three dimensional. As a simple illustration of what some environmental data might look like, here is an image from a simple 3D GIS I created (using VRML) i …

It's a great question. One standard set of iconic markers with which everyone in the world is familiar is their country's set of street signs: stop, yield, crossing ahead, etc. I hope the point of s …

One class of solutions uses Multidimensional scaling. This addresses exactly your question: given a set of distances (often obtained among points in a high dimensional space), find an embedding in on …

This was briefly discussed on the Statistical Analysis forum at https://stats.stackexchange.com/questions/2493/managing-error-with-gps-routes-theoretical-framework .

As always, it depends on your objectives and the nature of the data. For completely mapped data, a powerful tool is Ripley's L function, a close relative of Ripley's K function. Lots of software can …

The problem is to figure out how much to bend the arcs to enhance their visual resolution. Here's one solution (among the many possible). Let's consider all the arcs emanating from a common origin. …

This requires a kind of "field calculation" in which the value computed (based on a latitude, longitude, central azimuth, uncertainty, and distance) is the bowtie shape rather than a number. Because …