How do I create polygons crossing 0 Longitude in the Pacific

KarenMaloof1

I'm working with a txt file with a bunch of N, W, E and W extents, and turning them into polygons. Two of them are in the Pacific, crossing 0 Longitude, and when I try to create the polygon, it makes a very long polygon going the opposite direction around the world, rather than cross 0. How can I get the polygon to cross 0, while letting the script still work properly on the rest of the world?

Thanks,

Karen

XanderBakker

If you have 0 longitud the point will be located at Greenwhich longitude and not in the Pacific. Do you have longitudes near +180 and -180?

If I use the following code:

def main():
    import arcview
    import arcpy
    arcpy.env.overwriteOutput = True
    sr = arcpy.SpatialReference(4326) # WGS 1984

    # 01
    lon_min = 175
    lon_max = 185
    lat_min = 0
    lat_max = 10

    polygon = arcpy.Polygon(arcpy.Array([arcpy.Point(lon_min, lat_min),
                                        arcpy.Point(lon_min, lat_max),
                                        arcpy.Point(lon_max, lat_max),
                                        arcpy.Point(lon_max, lat_min),
                                        arcpy.Point(lon_min, lat_min)]),sr)

    fc_out = r"D:\Xander\GeoNet\AroundTheWorld\polygon01.shp"
    arcpy.CopyFeatures_management([polygon], fc_out)


    # 02
    lon_min = 175
    lon_max = -175
    lat_min = -10
    lat_max = 0

    polygon = arcpy.Polygon(arcpy.Array([arcpy.Point(lon_min, lat_min),
                                        arcpy.Point(lon_min, lat_max),
                                        arcpy.Point(lon_max, lat_max),
                                        arcpy.Point(lon_max, lat_min),
                                        arcpy.Point(lon_min, lat_min)]),sr)

    fc_out = r"D:\Xander\GeoNet\AroundTheWorld\polygon02.shp"
    arcpy.CopyFeatures_management([polygon], fc_out)

if __name__ == '__main__':
    main()

I get this:

Polygon 02 travels all around the world, while Polygon 01 crosses the date border since I used 185, instead of -175.