That's a cut and paste error. Should I have a crs element?
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-------- Original message --------
From: "Frank Broniewski <b...@metrico.lu>" <b...@metrico.lu>
Date:
To:
Subject: Re: [Community] geoJSON
Hi,
it does look OK to me, but you have line breaks in your GeoJson. Is this
a copy&paste error? If not, you should maybe remove them because that
could really screw up the OL parser (see the "ftype": "N
AT" and "name": "Department o
f Conservation" pieces in your example)
Frank
Am 2013-07-16 06:32, schrieb Robert Sanson:
> I am working on a Python server-side script to take an uploaded GPX
file, parse it to do some spatial queries, and then format it into
geoJSON to return it to an OpenLayers client.
>
> How critical is the order of the id, properties and geometry elements
in the geoJSON features?
>
> Here are some snippets of Python code:
>
> import json, geojson
>
> #create list to hold geojson features
> fl = []
>
> #For each waypoint
> for wpt in gpx.waypoints:
> #create geojson point based on the lat/longs in the GPX file
re-projected to a cartesian coordinate system
> gw = geojson.Point([str(x) +"," + str(y)])
>
> #Prepare my attributes
> attr =
{"date":wpt.comment,"fid":fid,"ftype":ftype,"fsize":fsize,"name":name,"postal1":postal1,"postal2":postal2,"postal3":postal3,"postalrd":postalrd,"postal4":postal4,"town":town,
>
"pcode":pcode,"homeph":homeph,"busph":busph,"mobile":mobile,"email":email,"elevation":str(wpt.elevation),"gheight":str(height),"htdiff":str(htdiff),"colour":colour}
>
> #create the geoJSON feature and add it to the list
> gf = geojson.Feature(id=wpt.name,properties=attr,geometry=gw)
> fl.append(gf)
>
> #finally put together in a feature collection
> fc = geojson.FeatureCollection(fl)
> print geojson.dumps(fc)
>
> Here is an example output by my script:
>
> {"type": "FeatureCollection", "features": [{"geometry": {"type":
"Point", "coordinates": ["1455676.30192,5249213.99569"]}, "type":
"Feature", "properties": {"town": "Hokitika", "postal1": null,
"postal2": null, "postal3": "Private Bag 701", "postal4": null, "name":
"Department of Conservation", "busph": "037568282", "mobile": null,
"colour": "brown", "fsize": 1035820.0, "gheight": "355.379", "pcode":
"7810", "ftype": "NAT", "fid": "WS00041", "htdiff": "13.4206970215",
"date": "04-NOV-12 11:19:34AM", "elevation": "368.8", "homeph": null,
"email": "westco...@doc.govt.nz", "postalrd": null}, "id": "045"},
{"geometry": {"type": "Point", "coordinates":
["1455737.89165,5249119.87719"]}, "type": "Feature", "properties":
{"town": "Hokitika", "postal1": null, "postal2": null, "postal3":
"Private Bag 701", "postal4": null, "name": "Department of
Conservation", "busph": "037568282", "mobile": null, "colour": "brown",
"fsize": 1035820.0, "gheight": "381.533", "pcode": "7810", "ftype": "N
> AT", "fid": "WS00041", "htdiff": "-1.23302001953", "date":
"04-NOV-12 11:19:41AM", "elevation": "380.3", "homeph": null, "email":
"westco...@doc.govt.nz", "postalrd": null}, "id": "046"}, {"geometry":
{"type": "Point", "coordinates": ["1456220.5418,5248259.03474"]},
"type": "Feature", "properties": {"town": "Hokitika", "postal1": null,
"postal2": null, "postal3": "Private Bag 701", "postal4": null, "name":
"Department of Conservation", "busph": "037568282", "mobile": null,
"colour": "brown", "fsize": 1035820.0, "gheight": "606.078", "pcode":
"7810", "ftype": "NAT", "fid": "WS00041", "htdiff": "46.5215087891",
"date": "04-NOV-12 11:20:59AM", "elevation": "652.6", "homeph": null,
"email": "westco...@doc.govt.nz", "postalrd": null}, "id": "047"},
{"geometry": {"type": "Point", "coordinates":
["1456236.64781,5248056.9161"]}, "type": "Feature", "properties":
{"town": "Hokitika", "postal1": null, "postal2": null, "postal3":
"Private Bag 701", "postal4": null, "name": "Department o
> f Conservation", "busph": "037568282", "mobile": null, "colour":
"brown", "fsize": 1035820.0, "gheight""ftype": "NAT", "fid": "WS00041",
"htdiff": "36.7909545898", "date":
"04-NOV-12 11:24:44AM", "elevation": "785.0", "homeph": null, "email":
"westco...@doc.govt.nz", "postalrd": null}, "id": "048"}, {"geometry":
{"type": "Point", "coordinates": ["1447818.17744,5244104.27075"]},
"type": "Feature", "properties": {"town": "", "postal1": "", "postal2":
"", "postal3": "", "postal4": "", "name": "", "busph": "", "mobile": "",
"colour": "brown", "fsize": 0, "gheight": "377.242", "pcode": "",
"ftype": "", "fid": "", "htdiff": "52.3581481934", "date": "04-NOV-12
11:37:05AM", "elevation": "429.6", "homeph": "", "email": "",
"postalrd": ""}, "id": "049"}]}
>
> Does this look correct?
>
> Is there some other way to prepare the properties rather than using a
dictionary?
>
> I am having trouble getting OpenLayers to consume this
>
> Many thanks,
>
> Robert Sanson
>
>
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--
Frank BRONIEWSKI
METRICO s.à r.l.
géomètres
technologies d'information géographique
rue des Romains 36
L-5433 NIEDERDONVEN
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