grid based maps

Torbjörn Tyler Torbjorn.Tyler at SYSBOT.LU.SE
Fri Oct 8 15:39:22 CDT 2004

Concerning the endless problem with distribution visualization...

The new version of the mapping program iMap indeed appears very promising, but still I have not found any program that can help me produce my grid-based maps (not based on lat./longitude data or US zip-codes, which are the formats handled by iMap). 

I want a system where I a can use any empty map, put any grid upon it, assign a label to each grid square and then use the data in my database (in the simpliest case containing presence/absence information for each taxon in each labeled grid-square) to accordingly fill some of the squares with black colour. I suppose it would be very simple to write such a program and I hope someone has allready done it (preferably for Mac) but I have not been able to find any such possibility in any of the mapping programs tested so far. (In some programs it is possible to "cheat" the program by assigning a coordinate to each grid and then try to choose a squarical symbol that fits exactly in the sqare on my map but this is not very very handy and the maps produced this way are never perfect ...).

Does anyone have a solution for this?


Torbjörn Tyler   /  Projekt Skånes Flora

Department of Ecology
Plant Ecology and Systematics
Ecology Building                                	
Sölvegatan 37         	
SE-223 62 Lund                          	
tel. +(0)46-222 09 10
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e-mail: torbjorn.tyler at

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