I’ve been working on a simple, publication-style map of my field sites to use in places where lots of color isn’t an option. A hillshade or satellite image version is next on the list.
GIS
Notebook: Generating random points
Method for generating random points inside a polygon using QGIS. These points will be sampled within 2-ha around the nest to verify accuracy of GIS data.
Notebook: Generating buffers
Method for generating buffers (circles) around nest to simulate breeding area (~ 3 ha) and breeding home range ( ~ 3700 ha) in QGIS1.
Vector > Geoprocessing Tools > Buffer
Input layer = layer with nest locations
Distance = 1.96 / 6.86 km2
Segments = 5 / 15
Remember to save scratch layers as shapefiles.
- These numbers come from research on Vancouver Island, published in McClaren et al. (2015). 3 ha is rounding up from 2.63 ha.
- Distance refers to diameter. This is the diameter that produces a circle of approximately the correct area.
Bird, Wandering 