Day: October 16, 2023

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My Truck

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Back in the simpler days when I had the little Ford Ranger truck.

Wednesday October 21, 2009 — Hawk's Nest

Miles From Delmar

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The other day, I was wondering roughly how far some of the places I've been are from home. So I said why don't I use a bulls-eye style multi-layer buffer, and make circles every 25 miles from home out 500 miles. The farthest I've been away from home in the past decade is West Virginia and the Blue Ridge Parkway, which is almost 500 miles away as the crows eye sees.

Overlay_Intersects and Buffers in QGIS 3.2x

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A common GIS task is to suppress duplicated points from other layers. What if those points don’t line up perfectly? Then you can’t use overlay_intersects but you can use intersects with a buffer. The key to using buffer with a layer is to use the aggregate function inside of the buffer function, so the layer appears as a MULTIPOLYGON or MULTIPOINT to the buffer command. Then just do an ordinary NOT intersects between the current layer and the buffered layer.

NOT intersects($geometry,
buffer(
aggregate('other_layer_compare_against', 'collect', $geometry)
,500 )
)