July saw Victoria follow NSW in making available online, free spatial data free. New Zealand’s LINZ released a significant amount of aerial imagery with more to follow. I checked out the VIC release and created a quick guide for those not familiar with accessing spatial data.
Apart from being useful to create base maps, spatial data makes it easy to georeference existing maps. The most useful data sets for orienteering and rogaining are elevation (contours, spot heights), transport (road, rail, tracks), hydro (lakes, streams, watercourses), property boundaries and vegetation density. Most of those data sets have associated infrastructure but some might be obtained from a features data set.
The remainder of this post deals with my quick survey of the VIC offering. The situation is likely to be broadly similar in other states.
900 data sets released on data.vic.gov.au
While Orienteering Victoria has had a free data licence for some years, acquiring a data set cost $200 for the work involved. Not to mention the time of orienteers in preparing and submitting the application.
Now you can download seemingly any or all of the six data sets useful to map sports to some degree.
Another 100 data sets will be available by September.
Locating your data sets
Easiest is to download the Guide below and search using the ID attached to each recommended data set. If you wish to peruse at leisure then read on.
Each data set may appear in multiple categories. For sport purposes, it appears easiest to search for or select a data set name that includes the words VicMap 1:25,000. These data sets include subsets that otherwise you would need to locate and order individually. For example, Vicmap Hydro 1:25,000 includes subsets watercourses (rivers, streams, channels…), water points (ponds, dams…), water areas (lakes, reservoirs…).
However, the listings are not perfect. For example at time of writing, the Spatial | Transport section does not include VicMap Transport 1:25,000 but does include VicMap Vegetation 1:25,000 (I have notified this).
A quick guide
For the uninitiated, selection of an appropriate data set may seem daunting when you first hit data.vic.gov.au. For example, if you select Transport from the category list shown you end up with social data sets, not spatial data sets. You first have to select Spatial, then the relevant sub category.
And which data format you select depends upon your edition of OCAD. For Professional, select ESRI Shape. For Standard, select Autocad DXF.
To assist, while watching the exciting Tour de France Mont Ventoux stage, I delved into the web site and prepared a quick guide which you can download. It will not be perfect but it should help you avoid long detours. I will update it as necessary (let me know of any errors) and am working on some short video guides.
1 page pdf. Updated 17 July 2013.