.png)
Description:
Pyqtree 1.0.0
Pyqtree is a pure Python spatial index for GIS or rendering usage. It
stores and quickly retrieves items from a 2x2 rectangular grid area, and
grows in depth and detail as more items are added. The actual quad tree
implementation is adapted from Matt Rasmussen’s compbio
library
and extended for geospatial use.
Platforms
Python 2 and 3.
Dependencies
Pyqtree is written in pure Python and has no dependencies.
Installing It
Installing Pyqtree can be done by opening your terminal or commandline
and typing:
pip install pyqtree
Alternatively, you can simply download the “pyqtree.py” file and place
it anywhere Python can import it, such as the Python site-packages
folder.
Example Usage
Start your script by importing the quad tree.
from pyqtree import Index
Setup the spatial index, giving it a bounding box area to keep track of.
The bounding box being in a four-tuple: (xmin, ymin, xmax, ymax).
spindex = Index(bbox=(0, 0, 100, 100))
Populate the index with items that you want to be retrieved at a later
point, along with each item’s geographic bbox.
# this example assumes you have a list of items with bbox attribute
for item in items:
spindex.insert(item, item.bbox)
Then when you have a region of interest and you wish to retrieve items
from that region, just use the index’s intersect method. This quickly
gives you a list of the stored items whose bboxes intersects your region
of interests.
overlapbbox = (51, 51, 86, 86)
matches = spindex.intersect(overlapbbox)
There are other things that can be done as well, but that’s it for the
main usage!
More Information:
Home Page
API Documentation
License:
This code is free to share, use, reuse, and modify according to the MIT
license, see LICENSE.txt.
Credits:
Karim Bahgat
Joschua Gandert
Changes
1.0.0 (2018-09-14)
Bump to first major version
Fix so returns list instead of set
Support inserting hashable items
0.25.0 (2016-06-22)
Misc user contributions and bug fixes
0.24.0 (2015-06-18)
Previous stable PyPI version.
License
For personal and professional use. You cannot resell or redistribute these repositories in their original state.
Files:
Customer Reviews
There are no reviews.
