Import Simple Data from KML Files

Hello, this is maybe also a question related to fiona but I will start here. I have a KML file (formerly a shape file with attribute columns) and want to load this KML with GeoPandas. So far so good, however, when returning the geodataframe, the attribute columns that are marked as “Simple Data” in the KML file are missing. Below, I posted a snipped of the KML file, how I load it and what the gdf looks like and what I want it to look like. The KML contains one folder. A google search was not sucessful until now.

Thanks for the help!

KML file:

<?xml version="1.0" encoding="utf-8" ?>
<kml xmlns="http://www.opengis.net/kml/2.2">
<Document id="root_doc">
<Schema name="interfaces1" id="interfaces1">
	<SimpleField name="id" type="float"></SimpleField>
	<SimpleField name="formation" type="string"></SimpleField>
</Schema>
<Folder><name>interfaces1</name>
  <Placemark>
	<ExtendedData><SchemaData schemaUrl="#interfaces1">
		<SimpleData name="formation">Ton</SimpleData>
	</SchemaData></ExtendedData>
      <Point><coordinates>19.1501280458077,293.313485355882</coordinates></Point>
  </Placemark>
..........
</Folder>
</Document></kml>

import fiona
import geopandas as gpd

gpd.io.file.fiona.drvsupport.supported_drivers['KML'] = 'rw'
# empty GeoDataFrame
gdf = gpd.GeoDataFrame()

# iterate over layers
for layer in fiona.listlayers('../../gemgis/data/Test1/KML/interfaces1.kml'):
    s = gpd.read_file(
        '../../gemgis/data/Test1/KML/interfaces1.kml', driver='KML', layer=layer)
    gdf = gdf.append(s, ignore_index=True)

gdf.head()

What I get:

What I want:

[andhuang-CLGX]

As a workaround, I was able to do this to extract simpledata tags

import fiona
fiona.drvsupport.supported_drivers['LIBKML'] = 'rw'

with fiona.open(file_path) as collection:
    gdf = gpd.GeoDataFrame.from_features(collection)

[and-viceversa]

@andhuang-CLGX solution worked for me on a simple single layer point .kml

It also works on @AlexanderJuestel kml snippet showing “formation” as an attribute field.

                 geometry  Name description  ...  icon    id formation
0  POINT (19.150 293.313)  None        None  ...  None  None       Ton

Not to say this is a solved issue, but some version of the base case lets you get by. Maybe the multi layer kml is the sticking point as others have mentioned.

EDIT: Note that my KML was also written from geopandas.

System info below (conda installed yesterday)

SYSTEM INFO
-----------
python     : 3.10.5 | packaged by conda-forge | (main, Jun 14 2022, 07:03:09) [Clang 13.0.1 ]
executable : /usr/local/anaconda3/envs/nssda/bin/python
machine    : macOS-12.5-x86_64-i386-64bit

GEOS, GDAL, PROJ INFO
---------------------
GEOS       : 3.11.0
GEOS lib   : /usr/local/anaconda3/envs/nssda/lib/libgeos_c.dylib
GDAL       : 3.5.1
GDAL data dir: /usr/local/anaconda3/envs/nssda/share/gdal
PROJ       : 9.0.1
PROJ data dir: /usr/local/anaconda3/envs/nssda/share/proj

PYTHON DEPENDENCIES
-------------------
geopandas  : 0.11.1
numpy      : 1.23.1
pandas     : 1.4.3
pyproj     : 3.3.1
shapely    : 1.8.2
fiona      : 1.8.21
geoalchemy2: None
geopy      : None
matplotlib : 3.5.2
mapclassify: 2.4.3
pygeos     : None
pyogrio    : None
psycopg2   : None
pyarrow    : None
rtree      : 1.0.0