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srs_test.go
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package geo
import (
"fmt"
"testing"
vec2d "github.com/flywave/go3d/float64/vec2"
"github.com/flywave/go-proj"
)
func TestSrs4326(t *testing.T) {
srs := newSRSProj4("EPSG:4326")
//dst := newSRSProj4("EPSG:900913")
if !srs.IsLatLong() {
t.FailNow()
}
srsStr := srs.GetDef()
if len(srsStr) == 0 {
t.FailNow()
}
t.Log(srsStr)
//pts := srs.TransformTo(dst, []vec2d.T{{8.3, 53.2}})
srs4326, _ := proj.NewProj("+proj=longlat +ellps=WGS84 +datum=WGS84 +no_defs ")
srs900913, _ := proj.NewProj("+proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0 +k=1.0 +units=m +nadgrids=@null +wktext +no_defs")
x, y, _ := proj.Transform2(srs4326, srs900913, 121.5272106*Deg2Rad, 31.1774276*Deg2Rad)
t.Log(fmt.Sprintf("%v %v", x, y))
x = 13528347.201518921
y = 3655812.9954997827
lx, ly, _ := proj.Transform2(srs900913, srs4326, x, y)
t.Log(fmt.Sprintf("%v %v", lx, ly))
}
func TestSrs(t *testing.T) {
srs := newSRSProj4("EPSG:900913")
if srs.IsLatLong() {
t.FailNow()
}
srsStr := srs.GetDef()
if len(srsStr) == 0 {
t.FailNow()
}
t.Log(srsStr)
}
func TestSrs26592(t *testing.T) {
srs := newSRSProj4("EPSG:26592")
if srs.IsLatLong() {
t.FailNow()
}
srsStr := srs.GetDef()
if len(srsStr) == 0 {
t.FailNow()
}
t.Log(srsStr)
}
func TestSrsTranRect(t *testing.T) {
src := newSRSProj4("EPSG:4326")
dest := newSRSProj4("EPSG:3857")
rect := src.TransformRectTo(dest, vec2d.Rect{Min: vec2d.T{-180.0, -90.0}, Max: vec2d.T{180.0, 90.0}}, 16)
t.Log(fmt.Sprintf("%v--%v--%v--%v/n", rect.Min[0], rect.Min[1], rect.Max[0], rect.Max[1]))
rect = src.TransformRectTo(dest, vec2d.Rect{Min: vec2d.T{53.1, 8.2}, Max: vec2d.T{53.2, 8.3}}, 16)
t.Log(fmt.Sprintf("%v--%v--%v--%v/n", rect.Min[0], rect.Min[1], rect.Max[0], rect.Max[1]))
}
func TestGenerateEnvelopePoints(t *testing.T) {
pts := GenerateEnvelopePoints(vec2d.Rect{Min: vec2d.T{10.0, 5.0}, Max: vec2d.T{20.0, 15.0}}, 8)
for i := range pts {
t.Log(fmt.Sprintf("%v--%v/n", pts[i][0], pts[i][1]))
}
}
func TestBBox(t *testing.T) {
rect := CalculateBBox([]vec2d.T{{-5, 20}, {3, 8}, {99, 0}})
t.Log(fmt.Sprintf("%v--%v--%v--%v/n", rect.Min[0], rect.Min[1], rect.Max[0], rect.Max[1]))
rect = MergeBBox(vec2d.Rect{Min: vec2d.T{-10, 20}, Max: vec2d.T{0, 30}}, vec2d.Rect{Min: vec2d.T{30, -20}, Max: vec2d.T{90, 10}})
t.Log(fmt.Sprintf("%v--%v--%v--%v/n", rect.Min[0], rect.Min[1], rect.Max[0], rect.Max[1]))
src_bbox := vec2d.Rect{Min: vec2d.T{939258.20356824622, 6887893.4928338043},
Max: vec2d.T{1095801.2374962866, 7044436.5267618448}}
dst_bbox := vec2d.Rect{Min: vec2d.T{939258.20260000182, 6887893.4908000007},
Max: vec2d.T{1095801.2365000017, 7044436.5247000009}}
if !BBoxEquals(src_bbox, dst_bbox, 61.1, 61.1) {
t.FailNow()
}
if BBoxEquals(src_bbox, dst_bbox, 0.0001, 0.0001) {
t.FailNow()
}
}
func TestMakeLinTransf(t *testing.T) {
transf := MakeLinTransf(vec2d.Rect{Min: vec2d.T{7, 50},
Max: vec2d.T{8, 51}},
vec2d.Rect{Min: vec2d.T{0, 0},
Max: vec2d.T{500, 400}})
pt := transf([]float64{7.5, 50.5})
t.Log(fmt.Sprintf("%v--%v/n", pt[0], pt[1]))
pt = transf([]float64{7.0, 50.0})
t.Log(fmt.Sprintf("%v--%v/n", pt[0], pt[1]))
}