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2
votes
2answers
128 views

Choosing intervals for a map of race in the United States

I'm creating an open map layer of race in the United States using Census Data. This layer will be publicly available in the near future as "Justice Map". The goal is to help others create maps using ...
4
votes
3answers
124 views

Missing Scottish Administrative Data in OS Opendata sets

I'm not sure if this forum is really the correct place to ask, but impertinence would lead me to believe that there may be some one on here that may know the answer. I'm using the Ordnance Survey Open ...
14
votes
4answers
332 views

Which data formats are best for Open Data distribution?

What are the pros and cons of different data formats (performance, file size, etc.) when considering open data distribution? Our organisation wants to publish data as open data. However, there is no ...
2
votes
2answers
109 views

Where can I go to have a rant about Open GEO Data?

Which is the most popular GIS forum or website that's not under the control of our corporate or government overlords? This place is great for questions and answers, but if I want to have a discussion ...
4
votes
3answers
1k views

Open source database of world locations [duplicate]

Possible Duplicate: Comprehensive list of Latitude and Longitude values of cities round the world i would like to know if is out there any downloadable database of world locations, i know ...
2
votes
4answers
282 views

Where can I get free New Zealand and Melbourne geodata?

I have just installed QGIS. Do any forum users know where I could download or access files and maps for 1) New Zealand, and/or 2) Melbourne/Victoria, Australia. Preferably it would be good to know ...
8
votes
2answers
1k views

Can ArcMap 9.3 process sqlite files?

I'm using qgis and grass for my work. I've produced a shapefile which is over 100mbs (s a result of some statistical analysis). If i convert it to sqlite format (spatially enabled) the data shrinks ...
2
votes
3answers
203 views

coordinate definitions from nyc.gov open data SpatialLocation field

The NYC Open Data website has a dataset of street events. The last column is called SpatialLocation, and is defined as a text field. An example is below. It is clearly two points on a physical map. ...
6
votes
5answers
2k views

Problem loading OS OpenData multipoint shapefile into PostGIS

I am trying to load the OS OpenData Strategi shapefile dataset into a PostGIS database. I have had no problems with the polyline and polygon shapefiles, but I am unable to get the point shapefiles to ...
9
votes
2answers
2k views

Derive WGS84 Longitude & Latitude from British Northings & Eastings

I'm looking for a fairly simple way to append columns with WGS84 longitude and latitude to a table containing northings and eastings. The source data is Ordnance Survey's CodePoint Open, which I is ...
3
votes
2answers
911 views

Using openlayers to render UK National Grid maps

Is there a way I can use Openlayers with a 1 pixel = 1m/2m/4m OS Grid map at high resolutions (i.e. OS Street View), but switching to a Mercator projection when you zoom out (i.e. for Google Maps or ...
12
votes
3answers
4k views

Where to download free elevation data for Europe?

Where can I find free elevation data for Europe? Please mention the available resolutions and terms of use when posting a source.
1
vote
1answer
262 views

Direction on OS Meridian data

I've been looking to use the Ordanance Survey's Meridian data (part of the their OpenData suite) for doing vehicle routing. Whilst I can infer road class from the NUMBER property on each polyline, I ...
3
votes
5answers
1k views

Ways to load OS VectorMap data

Us lucky fellows in the UK have been able to access public geodata from Ordance Survey under an open licence since April this year. Some of the datasets, including VectorMap, are broken into 100 ...
2
votes
3answers
160 views

What are the licence limitations on the free Ordnance Survey (OS) data sets?

The OS has some “free” map data, but what am I allowed to use it for?