de_merge.py 10.5 KB
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# coding=utf-8
#author:        4N
#createtime:    2022/3/8
#email:         nheweijun@sina.com

import math

from osgeo import ogr
from osgeo.ogr import *

from test.zonghe.ShapeData import ShapeData


class Zonghe:

    data:ShapeData
    area_threshold = 100.0
    buffer_threshold = 100.0
    distance_buffer_threshold = 2.114691025217302e-04

    def __init__(self,data):
        self.data = data


    def creat_point(self,tuple):
        p: Geometry = ogr.Geometry(ogr.wkbPoint)
        p.AddPoint(tuple[0], tuple[1])
        return p



    def merge2(self,p1,p2):

        polygons = []
        points = []

        for p in [p1,p2]:

            if p.GetGeometryCount() == 1:
                polygon_line: Geometry = ogr.ForceToLineString(p)
            # 有孔Polygon
            else:
                polygon_line: Geometry = ogr.ForceToLineString(p.GetGeometryRef(0))

            points.extend(polygon_line.GetPoints()[:-1])

        multipoint: Geometry = ogr.Geometry(ogr.wkbMultiPoint)


        for p in  points:
            poi = ogr.Geometry(ogr.wkbPoint)
            poi.AddPoint(p[0],p[1])
            multipoint.AddGeometry(poi)

        delauney: Geometry = multipoint.DelaunayTriangulation()
        merge_polygon = None

        for p in delauney:

            p_c = p.Centroid()

            # print("\"" + p_c.ExportToWkt() + "\",")
            if p1.Contains(p) or p2.Contains(p):
                continue
            print("\"" + p.ExportToWkt() + "\",")


        return polygons



    #这个是融合面
    def merge(self,p1,p2):

        if p1.GetGeometryCount() == 1:
            polygon_line1: Geometry = ogr.ForceToLineString(p1)
        # 有孔Polygon
        else:
            polygon_line1: Geometry = ogr.ForceToLineString(p1.GetGeometryRef(0))


        p1_points =   polygon_line1.GetPoints()[:-1]

        if p2.GetGeometryCount() == 1:
            polygon_line2: Geometry = ogr.ForceToLineString(p2)
        # 有孔Polygon
        else:
            polygon_line2: Geometry = ogr.ForceToLineString(p2.GetGeometryRef(0))

        p2_points = polygon_line2.GetPoints()[:-1]
        multipoint: Geometry = ogr.Geometry(ogr.wkbMultiPoint)

        p1_int = []
        for indx,p in enumerate(p1_points):

            p_t = False
            for pp in p2_points:
                line = ogr.Geometry(ogr.wkbLineString)
                line.AddPoint(p[0], p[1])
                line.AddPoint(pp[0], pp[1])

                ggg:Geometry = line.Intersection(p1)

                if ggg.GetGeometryType() in [1,-2147483647,3001]:
                    p_t = True
                    break
            if p_t:
                pppp = ogr.Geometry(ogr.wkbPoint)
                pppp.AddPoint(p[0],p[1])
                p1_int.append(p)
                multipoint.AddGeometry(pppp)


        for indx,p in enumerate(p2_points):

            p_t = False
            for pp in p1_int:
                line = ogr.Geometry(ogr.wkbLineString)
                line.AddPoint(p[0], p[1])
                line.AddPoint(pp[0], pp[1])

                ggg:Geometry = line.Intersection(p2)


                if ggg.GetGeometryType() in [1,-2147483647,3001]:
                    p_t = True
                    break
            if p_t:

                pppp = ogr.Geometry(ogr.wkbPoint)
                pppp.AddPoint(p[0],p[1])


                multipoint.AddGeometry(pppp)



        delauney: Geometry = multipoint.DelaunayTriangulation()

        for indx in range(delauney.GetGeometryCount()):
            tri:Geometry = delauney.GetGeometryRef(indx)
            dif1:Geometry = tri.Difference(p1)
            dif2:Geometry = tri.Difference(p2)

        # return [multipoint.ExportToWkt()]

        return [p.ExportToWkt() for p in delauney]



    #这个是融合面
    def mergebac(self,p1,p2):

        if p1.GetGeometryCount() == 1:
            polygon_line1: Geometry = ogr.ForceToLineString(p1)
        # 有孔Polygon
        else:
            polygon_line1: Geometry = ogr.ForceToLineString(p1.GetGeometryRef(0))


        p1_points =   polygon_line1.GetPoints()[:-1]

        if p2.GetGeometryCount() == 1:
            polygon_line2: Geometry = ogr.ForceToLineString(p2)
        # 有孔Polygon
        else:
            polygon_line2: Geometry = ogr.ForceToLineString(p2.GetGeometryRef(0))

        p2_points = polygon_line2.GetPoints()[:-1]
        multipoint: Geometry = ogr.Geometry(ogr.wkbMultiPoint)


        p1_point_start = None
        p1_point_end = None

        for indx,p in enumerate(p1_points):

            p_t = False
            for pp in p2_points:
                line = ogr.Geometry(ogr.wkbLineString)
                line.AddPoint(p[0], p[1])
                line.AddPoint(pp[0], pp[1])

                ggg:Geometry = line.Intersection(p1)

                if ggg.GetGeometryType() in [1,-2147483647,3001]:
                    p_t = True
                    break
            if p_t:
                pppp = ogr.Geometry(ogr.wkbPoint)
                pppp.AddPoint(p[0],p[1])

                if p1_point_start is None:
                    p1_point_start = indx

                multipoint.AddGeometry(pppp)
                p1_point_end = indx

        p1_int = p1_points[p1_point_start:p1_point_end+1]


        p2_point_start = None
        p2_point_end = None


        for indx,p in enumerate(p2_points):

            p_t = False
            for pp in p1_int:
                line = ogr.Geometry(ogr.wkbLineString)
                line.AddPoint(p[0], p[1])
                line.AddPoint(pp[0], pp[1])

                ggg:Geometry = line.Intersection(p2)


                if ggg.GetGeometryType() in [1,-2147483647,3001]:
                    p_t = True
                    break
            if p_t:

                pppp = ogr.Geometry(ogr.wkbPoint)
                pppp.AddPoint(p[0],p[1])

                if p2_point_start is None:
                    p2_point_start = indx

                multipoint.AddGeometry(pppp)

                p2_point_end = indx

        delauney: Geometry = multipoint.DelaunayTriangulation()

        p2_int = p2_points[p2_point_start:p2_point_end + 1]
        if p2_point_end == len(p2_points)-1:
            p2_int = p2_points[p2_point_start:p2_point_end + 1]

        p1_int.extend(p2_int)

        print(p2_point_start,p2_point_end)

        multipoint: Geometry = ogr.Geometry(ogr.wkbMultiPoint)

        for p in p1_int:
            pppp = ogr.Geometry(ogr.wkbPoint)
            pppp.AddPoint(p[0], p[1])
            multipoint.AddGeometry(pppp)

        return [multipoint.ExportToWkt()]

        # return [p.ExportToWkt() for p in delauney]


    def merge4(self,polygons):


        mp: Geometry = ogr.Geometry(ogr.wkbMultiPolygon)
        for p in polygons:
            mp.AddGeometry(p)



        delauney: Geometry = mp.DelaunayTriangulation()

        intp = []
        for p in delauney:

            res = p
            ispass = False
            for pp in polygons:
                check:Geometry = res.Difference(pp)
                if check.IsEmpty():
                    ispass = True
                    break
                else:
                    res = check
            if not ispass:
                res_buffer = self.extend_tri(res)

                intp.append(res_buffer)


        polygons.extend(intp)

        mp: Geometry = ogr.Geometry(ogr.wkbMultiPolygon)

        for p in polygons:
            mp.AddGeometry(p)



        merge:Geometry = mp.UnionCascaded()

        return [merge.ExportToWkt()]

        # return [p.ExportToWkt() for p in intp]


    def extend_tri(self,triangle:Geometry):

        center:Geometry = triangle.Centroid()
        tri_line: Geometry = ogr.ForceToLineString(triangle)

        result_geo = ogr.Geometry(ogr.wkbPolygon)
        result_geo_ring:Geometry = ogr.Geometry(ogr.wkbLinearRing)
        for point in tri_line.GetPoints():
            radpoint = self.get_radpoint(center.GetX(),center.GetY(),point[0],point[1],0.00000001)

            result_geo_ring.AddPoint(radpoint.GetX(),radpoint.GetY())
        result_geo.AddGeometry(result_geo_ring)

        return result_geo

    def get_radpoint(self,x0,y0,x1,y1,len_size):
        a2 = math.pow((x1-x0),2)
        b2 = math.pow((y1-y0),2)
        len_size = len_size+ math.sqrt(a2+b2)

        tanx = abs(y1-y0) / abs(x1-x0)
        cosx = 1 / math.sqrt(1 + tanx *tanx)
        dx = cosx* len_size
        dy = tanx * dx

        if x1 == x0:
            x2 = x0
            if y1 > y0 :
                y2 = y0 + abs(dy)
            else:
                y2 = y0 - abs(dy)
        else:
            if x1 < x0:
                x2 = x0 - dx
            else:
                x2 = x0 + dx

            if y1 < y0:
                y2 = y0 - dy
            else:
                y2 = y0 + dy

        other_point = ogr.Geometry(ogr.wkbPoint)
        other_point.AddPoint(x2, y2)

        return  other_point



    def merge5(self,p1:Geometry,p2):



        ext = p1.GetEnvelope()

        tor = min(ext[1]-ext[0],ext[3]-ext[2])

        pp = p1.Simplify(tor/20)

        pp2 = p2.Simplify(tor / 20)

        return [pp.ExportToWkt(),pp2.ExportToWkt() ]

    def process(self):
        polygons = self.data.get_polygons()

        # return self.merge(polygons[0],polygons[1])

        return self.merge4(polygons)


if __name__ == '__main__':


    # print(sd.get_polygons()[0])
    # sd.close()

    # create = True
    # create = False
    #
    # if create:
    #
    #     sd = ShapeData(r"J:\Data\制图综合\me.shp")
    #
    #     ext =  sd.layer.GetExtent()
    #     threshold = (ext[1]-ext[0])/20
    #     print(threshold)
    #
    #
    #     zh = Zonghe(sd)
    #     zh.process()
    # else:
    #     wkts = ["POLYGON ((113.371086251 22.5101043861001,113.371311338 22.5099257505,113.371611445 22.5098560668001,113.371450698 22.5095291511,113.370775465 22.5096884259,113.371086251 22.5101043861001))"
    #             ]
    #     result = r"J:\Data\制图综合\mes.shp"
    #     ShapeData.create_shp_fromwkts(result,"zh",wkts)
    #


    sd = ShapeData(r"J:\Data\制图综合result\ex1.shp")

    ext =  sd.layer.GetExtent()
    threshold = (ext[1]-ext[0])/20

    zh = Zonghe(sd)
    wkts = zh.process()

    result = r"J:\Data\制图综合result\ex1_1.shp"
    ShapeData.create_shp_fromwkts(result,"zh",wkts)