6257ddba78
The big change is that the GeoJSON package has been completely rewritten to fix a few of geometry calculation bugs, increase performance, and to better follow the GeoJSON spec RFC 7946. GeoJSON updates - A LineString now requires at least two points. - All json members, even foreign, now persist with the object. - The bbox member persists too but is no longer used for geometry calculations. This is change in behavior. Previously Tile38 would treat the bbox as the object's physical rectangle. - Corrections to geometry intersects and within calculations. Faster spatial queries - The performance of Point-in-polygon and object intersect operations are greatly improved for complex polygons and line strings. It went from O(n) to roughly O(log n). - The same for all collection types with many children, including FeatureCollection, GeometryCollection, MultiPoint, MultiLineString, and MultiPolygon. Codebase changes - The pkg directory has been renamed to internal - The GeoJSON internal package has been moved to a seperate repo at https://github.com/tidwall/geojson. It's now vendored. Please look out for higher memory usage for datasets using complex shapes. A complex shape is one that has 64 or more points. For these shapes it's expected that there will be increase of least 54 bytes per point.
33 lines
910 B
Go
33 lines
910 B
Go
// Copyright 2018 Joshua J Baker. All rights reserved.
|
|
// Use of this source code is governed by an MIT-style
|
|
// license that can be found in the LICENSE file.
|
|
|
|
package geo
|
|
|
|
import "testing"
|
|
|
|
func TestGeoCalc(t *testing.T) {
|
|
dist := 172853.26908429610193707048892974853515625
|
|
bearing := 320.8560640269032546711969189345836639404296875
|
|
latA, lonA := 33.112, -112.123
|
|
latB, lonB := 34.312, -113.311
|
|
// DistanceTo
|
|
value := DistanceTo(latA, lonA, latB, lonB)
|
|
if value != dist {
|
|
t.Fatalf("expected '%v', got '%v'", dist, value)
|
|
}
|
|
// BearingTo
|
|
value = BearingTo(latA, lonA, latB, lonB)
|
|
if value != bearing {
|
|
t.Fatalf("expected '%v', got '%v'", bearing, value)
|
|
}
|
|
// DestinationPoint
|
|
value1, value2 := DestinationPoint(latA, lonA, dist, bearing)
|
|
if value1 != latB {
|
|
t.Fatalf("expected '%v', got '%v'", latB, value1)
|
|
}
|
|
if value2 != lonB {
|
|
t.Fatalf("expected '%v', got '%v'", lonB, value2)
|
|
}
|
|
}
|