Mapping Hacks

by Schuyler Erle, Rich Gibson and Jo Walsh

Archive for May, 2008

Coordinate Conversion with Google Maps

Saturday, May 31st, 2008

I just got an email from someone wanting to know how to convert from degrees-minutes-seconds to decimal degrees.  There are calculators online to do that, and we wrote about how to do it in Mapping Hacks, but you can also use Google Maps:
Example, enter this as your location:
38 54′ 4.35″ N, 76 42′ 45.22″ W
The […]

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Gigapans of WhereCamp

Thursday, May 29th, 2008

WhereCamp2008 rocked my world. Here is a gigapan from the event, and links to more. (this is implemented in an iframe, because I don’t know how to get wordpress to allow an embedded object in a post - email me if you have advice)</p>

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Gigapans and Quadtrees

Thursday, May 29th, 2008

I’ve been taking lots of Gigapan images. One of the neat things about Gigapans is that they are using image tiling to let you pan and zoom around in image-space. They are using a modified version of the Flash Earth browser which Paul Neave wrote to access Google Maps tiles.
I wrote up a […]

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Geohash implemented in Python

Thursday, May 29th, 2008

Schuyler wrote a python module to support the Geohash latitude/longitude encoding system created by Gustavo Niemeyer. (wikipedia link).
Schuyler’s python implementation of geohashing code is here.
Geohashing is not to be confused with the more amusing but arguably less useful xkcd geohashing, an implementation of that code lives here .
There is of course also an […]

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Douglas-Peucker Line Simplification in Python

Monday, May 5th, 2008

The code is here

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Updated World Borders Dataset

Friday, May 2nd, 2008

Posted in geodata, data | No Comments »


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