Questions tagged [predicates]

The tag has no usage guidance.

Filter by
Sorted by
Tagged with
6
votes
3answers
380 views

Multipolygon supposed to be contained by another but returned False with Shapely

There are two multi-polygons a and A where a is supposed to be contained inside A. Using shapely, the following difference operator b = a.difference(A) print(b) gives POLYGON EMPTY However testing A....
1
vote
2answers
135 views

R and sf Binary Predicates

Am trying to dial-down into the definitions and cannot resolve or understand the argument named, "prepared". The definition of prepared is: "logical; prepare geometry for x, before ...
-2
votes
1answer
46 views

Seeking offline predicted travel time service, package or software? [closed]

I am looking for a service/package/sw that will return the predicted travel time (not real time) between two points and the departure day and time. The predicted travel time must take into account the ...
5
votes
1answer
7k views

How to efficiently determine which of thousands of polygons intersect with a linestring [duplicate]

I have a shapefile that contains several thousand Polygons/MultiPolygons and another shapefile that has a variable number of LineStrings. In the example below the blue Polygons are those that ...
2
votes
3answers
412 views

How to find the "first" intersection of a line with anything else

I am trying to find the first intersection of a line with anything else. By first intersection I mean the first intersection, if you follow the line in its direction from start to end. Check the ...