我的Python代码:
from geopandas import GeoSeries
from shapely.geometry import Point
WGS84 = {'init': 'epsg:4326'}
p1 = (41.8121843, 45.2178516,)
p2 = (41.8124878, 45.2177536,)
point2 = Point(p2)
s2 = GeoSeries(point2, crs=WGS84)
rotated = s2.rotate(90, p1) # Try to rotate p2 around p1
print(rotated) # 41.8122823 45.2181551
我的JS代码(Turf.js):
var p1 = [41.8121843, 45.2178516];
var p2 = [41.8124878, 45.2177536];
var l = turf.lineString( [p1, p2] );
L.geoJson(l, {style: {color: '#0000ff', fillOpacity: 1, fillColor: '#0000ff', opacity: 1}}).addTo(map);
// Rotate line around p1
var trufRotated = turf.transformRotate(l, -90, {pivot: p1});
L.geoJson(trufRotated, {style: {color: '#ff0000'}}).addTo(map);
插图。蓝色是原来的线。红色是使用 Turf.js 旋转的线(正常)。绿色是使用 GeoPandas 旋转的线(不行):
使用 geopandas 旋转的绿线偏移量错误。也许是投影问题,但我不知道如何解决它。
我的问题是如何使用 GeoPandas 正确旋转?
解决了。感谢@PaulH。我需要在墨卡托中进行旋转并在经/纬度中再次翻译它:
WGS84 = {'init': 'epsg:4326'}
MERC = {'init': 'epsg:3857'}
p1 = (41.8121843, 45.2178516,)
p2 = (41.8124878, 45.2177536,)
point1 = Point(p1)
point2 = Point(p2)
s1 = GeoSeries(point1, crs=WGS84)
s2 = GeoSeries(point2, crs=WGS84)
s11 = s1.to_crs(MERC)
s22 = s2.to_crs(MERC)
rotated = s22.rotate(90, s11[0])
rotated = rotated.to_crs(WGS84)
print(rotated)
出于某种原因,这对我不起作用。 geopandas.rotate() 根本不想与我的形状文件合作!如果其他人也遇到类似的问题,实现同样目标的肮脏方法是
import geopandas as gpd
import shapely.geometry as geom
import random
# Generate geodataframe with random coordinates
geo = [geom.Point(random.uniform(-180, 180), random.uniform(-90, 90)) for _ in range(10)]
points = points.GeoDataFrame(geometry=geo)
def rotate_points(point):
x,y = point
return(y,-x)
gdf['geometry'] = gdf['geometry'].apply(lambda geom: geom.coords[0]).apply(rotate_points).apply(Point)
这将使所有点相对于原点顺时针旋转 90 度。当然,这可以推广到任何其他旋转,最简单的是 90 的整数,通过替换
return(y,-x)
进行适当的变换。
逆时针90度:
return(-y,x)
对于 180 度:
return(-x,-y)