Question

        x = float(stand[1].split(' ')[0])
        y = float(stand[1].split(' ')[1])
        coordinate = ppygis.Point(x, y)
        coordinate.srid = SRID_WGS84
        # Stand delimiters
        delimiter = []
        line = []

        for i in range(2, len(stand)):
            # The cycle will run through everythin in the stand list
            # But it will only actually do something when it finds a coordinate
            # counter
            if (len(stand[i].split(' ')) == 1):
                # Number of coordinates to process. Adjusted for indexation
                ncoords = int(stand[i]) + 1

                for c in range(i + 1, i + ncoords, 1):
                    x = float(stand[c].split(' ')[0])
                    y = float(stand[c].split(' ')[1])

                    point = ppygis.Point(x, y)
                    point.srid = SRID_WGS84
                    line.append(point)
                line = ppygis.LineString((line))
                delimiter.append(line)
                line = []
        delimiter = ppygis.MultiLineString((delimiter))
        cur.execute("""
                INSERT INTO taxi_stands(id, name, coordinates, delimiter_geom)
                VALUES(%s, %s, ST_PointFromText(%s), %s);
                """, (taxi_stands_list.index(stand), stand_name, coordinate,
                    delimiter))

我们正在尝试使用Python将MultiLineString插入到PostgreSQL数据库中。我们使用ppygis将坐标转换为实际几何。支架是要插入的坐标。列表的格式如下：

[nº of points in line, x1line1, y1line1, ..., nº of points in line, ...]

插入数据库时，我们收到此错误：

psycopg2.InternalError: parse error - invalid geometry
HINT:  "0101000020e6100000645d" <-- parse error at position 22 within geometry
CONTEXT:  SQL function "st_pointfromtext" statement 1

如果我们将ST_PointFromText更改为ST_GeomFromText，则错误为：

psycopg2.InternalError: parse error - invalid geometry
HINT:  "0101000020e6100000645d" <-- parse error at position 22 within geometry

ppygis python模块在文档中也非常缺乏，我们不知道哪个是错误。

有任何帮助吗？谢谢。

Answer 1

请勿使用St_PointFromText()，因为您的几何图形已经是WKB格式（ST_PointFromText需要WKT格式的几何图形）。

只需更改您的陈述：

cur.execute("""
                INSERT INTO taxi_stands(id, name, coordinates, delimiter_geom)
                VALUES(%s, %s, %s, %s);
                """, (taxi_stands_list.index(stand), stand_name, coordinate,
                    delimiter))

psycopg2.InternalError：解析错误 - 无效的几何体

1 个答案: