orig author: jjguy modified by: chucknthem This is fork of heatmap by jjguy. It's about 30 times faster than the original version 1.0.
heatmap is a python library for creating heatmaps.
Works with gps coordinates and generates KML files for overlaying heatmaps on Google Earth.
Full documentation at http://jjguy.com/heatmap
See Also: http://code.google.com/p/gheat/
Either clone this git repo or download the source. Then install it as a normal python package:
python setup.py install
- New and faster heatmap generating algorithm.
- Fixed an issue with points at the border of the heatmap being clipped.
- Allows generating a time sequenced kml file for visualising heatmaps over time.
hm = heatmap.Heatmap()
hm.animated_heatmapKML(
pointsets,
outputfile,
opacity=128,
dotsize=150,
size=(2048, 2048),
scheme="classic")
Most parameters are the same as the heatmap() function described below. The only difference is the 'pointset' parameter which is defined as follows:
pointset = [(begin, end, [lat, lng]), (begin, end, [lat, lng]), ...]
where begin and end are dates in the format yyyy-mm-dd
This will generate a single .kml file and n = len(pointset) .png files.
Original documentation from http://jjguy.com/heatmap/
heatmap() has only two required parameters:
A list of two-element tuples
The filename to save the resulting image
There are several optional parameters, with reasonable defaults:
| heatmap(self, points, fout, dotsize=150, opacity=128, size=(1024, 1024), scheme='classic')
| points -> an iteratable list of tuples, where the contents are the
| x,y coordinates to plot. e.g., [(1, 1), (2, 2), (3, 3)]
| fout -> output file for the PNG
| dotsize -> the size of a single coordinate in the output image in
| pixels, default is 150px. Tweak this parameter to adjust
| the resulting heatmap.
| opacity -> the strength of a single coordiniate in the output image.
| Tweak this parameter to adjust the resulting heatmap.
| size -> tuple with the width, height in pixels of the output PNG
| scheme -> Name of color scheme to use to color the output image.
| Use schemes() to get list. (images are in source distro)
import heatmap
import random
if __name__ == "__main__":
pts = []
for x in range(400):
pts.append((random.random(), random.random() ))
print "Processing %d points..." % len(pts)
hm = heatmap.Heatmap()
hm.heatmap(pts, "classic.png")
import heatmap
import random
hm = heatmap.Heatmap()
pts = [(random.uniform(-77.012, -77.050), random.uniform(38.888, 38.910)) for x in range(100)]
hm.heatmap(pts, "classic.png")
hm.saveKML("data.kml")
heatmap 1.0 [email protected]
Build heatmaps in python. Requires the Python Imaging Library.
Minimal example in example.py. Full readme at http://jjguy.com/heatmap/
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