Quickly define a near circular polygon around a point
Moderators: i-Tree Support, i-Tree Team
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- Posts: 2
- Joined: Fri Mar 01, 2013 8:43 am
Quickly define a near circular polygon around a point
For a malaria study, I want to use iTree Canopy to assess tree cover within 2 miles of specific points in Africa. To do this, I need a quick way to use "Define project area" to draw a near circular polygon (an octagon would suffice) around each point. How can I do this? Can I define the polygon once, then transform the vertices to move the polygon to various locations?
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- i-Tree Team
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- Joined: Fri Dec 21, 2012 7:45 am
Creating circular areas for use in Canopy
This is not currently possible within i-Tree canopy. However, depending on what resources you have available, it should be relatively simple in GIS.
In Esri's ArcGIS or the free QGIS you could create points and then just buffer those points with a 2 mile buffer. A buffer around a point should be circular. If you already have coordinates for your points you could also import those first to a GIS and then just buffer those points.
Once you create those shapefiles you can then use them as your boundary in Canopy using the "Load Esri Shapefile) button.
If you are interested in trying on of these methods let me know and I will point you to some resources.
-Jason
In Esri's ArcGIS or the free QGIS you could create points and then just buffer those points with a 2 mile buffer. A buffer around a point should be circular. If you already have coordinates for your points you could also import those first to a GIS and then just buffer those points.
Once you create those shapefiles you can then use them as your boundary in Canopy using the "Load Esri Shapefile) button.
If you are interested in trying on of these methods let me know and I will point you to some resources.
-Jason
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- Posts: 2
- Joined: Fri Mar 01, 2013 8:43 am