diametrically opposed, in geography: situated on the opposite side of the earth

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Making world map to show where hole drilled through centre of Earth starts/ends on land vs water?

I am discussing drilling through the Earth with my students. The classic cartoon version has a person drilling down in the United States and coming up in China, which has to be wrong because drilling ...
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1answer
201 views

Error 'Invalid geography. Antipodal edge…' with Postgis

I have a table in postgis like this CREATE TABLE locations (id int, name VARCHAR(255), pos geography(POINT, 4326)); with a couple of points. E.G. INSERT INTO locations (name, pos) VALUES ...
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Antipodal distance (or polygon fetch or polygon diameter) for concave polygons

I am working on some class examples in Python implemented within ArcMap to calculate the antipodal distance within a polygon. This is fairly routine for convex polygons, however, for concave ...