Polygons appear over Africa?

[michaelnewsome2]

https://github.com/simzou/nielsen-dma/blob/master/nielsen-mkt-map_simplified.json

Is there a formula to covert them back of North America?

[bauersfeld]

Any answer on why the coordinates of the geojson coordinates are off? Is there a transformation or projection that can be applied to resolve the issue?

[dsmallespe]

Any update on the polygon issue with Africa? I'm seeing the same thing.

[AdarshNamala]

to convert topoJson to geoJson, the following worked for me:
required functions: https://github.com/sgillies/topojson/blob/master/topojson.py
reference: https://chart-studio.plotly.com/~empet/14397.embed

---

#Load the topojson file:
with urlopen("https://raw.githubusercontent.com/simzou/nielsen-dma/master/nielsentopo.json") as request:
    topojson = json.load(request)
    
#Get the required values
topfeats  = topojson['objects']['nielsen_dma']['geometries']
scale = topojson['transform']['scale']
translation = topojson['transform']['translate']

#Convert to geojson
geoJSON=dict(type= 'FeatureCollection', 
             features = [])

for tfeature in topfeats:
    geo_feature = dict(id=tfeature['id'], type= "Feature")
    geo_feature['properties'] = tfeature['properties']
    # geometry function from link above (required functions)
    geo_feature['geometry'] = geometry(tfeature, topojson['arcs'], scale, translation)    
    geoJSON['features'].append(geo_feature)