dxf2gml

#!/usr/bin/env python3
import sys, argparse, ezdxf, os
from xml.dom import minidom
from pprint import pprint

types = "POINT,LINE,POLYLINE,LWPOLYLINE"
p = argparse.ArgumentParser(description='dxf2gml')
p.add_argument('-i', '--input', action='store', help='input filename (DXF)', required = True)
p.add_argument('-o', '--output', action='store', help='output filename (GML)', required = True)
p.add_argument('-l', '--layers', action='store', help='coma separatted list of layers')
p.add_argument('-t', '--type', action='store', help='coma separatted list of object types [{}]'.format(types))

r = p.parse_args()
layers = None
types = types.split(',')

if r.layers:
    layers = r.layers.split(",")

if r.type:
    types = r.type.split(",")

if "POINT" in types:
    print (types)
exit

xml = minidom.Document()
wfs = xml.createElement('wfs:FeatureCollection')
wfs.setAttribute("xmlns:wfs", "http://www.opengis.net/wfs")
wfs.setAttribute("xsi:schemaLocation", "http://www.opengis.net/gml http://schemas.opengis.net/gml/2.1.2/feature.xsd")
wfs.setAttribute("xmlns:xsi","http://www.w3.org/2001/XMLSchema-instance")

doc = ezdxf.readfile(r.input)

msp = doc.modelspace()

def createCoordinates(coords):
    text = ""
    for c in coords:
        if text != "":
            text += " "
        x, y, z = c
        if  z != 0:
            text += '{:.2f},{:.2f},{:.2f}'.format(x, y, z)
        else:
            text += '{:.2f},{:.2f}'.format(x, y)

    co = xml.createElement("gml:coordinates")
    co.setAttribute("decimal", ".")
    co.setAttribute("cs", ",")
    co.setAttribute("ts", " ")
    co.appendChild(xml.createTextNode(text))
    return co

for e in msp:
    if not layers or e.dxf.layer in layers:
        coords=""
        if e.dxftype() == "POINT" and "POINT" in types:
            co = createCoordinates([e.dxf.location])
            geometry = xml.createElement('gml:Point')
            geometry.setAttribute("srsName", "EPSG:3765")
            geometry.appendChild(co)
        elif e.dxftype() == "LINE" and "LINE" in types:
            co = createCoordinates([e.dxf.start, e.dxf.end])
            geometry = xml.createElement('gml:LineString')
            geometry.setAttribute("srsName", "EPSG:3765")
            geometry.appendChild(co)
        elif e.dxftype() == "POLYLINE" and "POLYLINE" in types:
            pprint(e)
            continue
        elif e.dxftype() == "LWPOLYLINE" and "LWPOLYLINE" in types:
            coords = []
            for x, y in e.vertices():
                coords.append((x,y, e.dxf.elevation))
            co = createCoordinates(coords)
            lr = xml.createElement('gml:LinearRing')
            lr.appendChild(co)
            outb = xml.createElement('gml:outerBoundaryIs')
            outb.appendChild(lr)

            geometry = xml.createElement('gml:Polygon')
            geometry.setAttribute("srsName", "EPSG:3765")
            geometry.appendChild(outb)
        else:
            print("Skipping {} in layer '{}' ...".format(e.dxftype(), e.dxf.layer))
            continue


        feature = xml.createElement('feature:geometry')
        feature.appendChild(geometry)

        features = xml.createElement('feature:features')
        features.appendChild(feature)
        features.setAttribute("xmlns:feature", "http://mapserver.gis.umn.edu/mapserver")

        gml_fm = xml.createElement('gml:featureMember')
        gml_fm.appendChild (features)
        gml_fm.setAttribute("xmlns:gml", "http://www.opengis.net/gml")
        wfs.appendChild (gml_fm)

print(wfs.toprettyxml(indent="  "), file=open(r.output, "w"))