Hi folks, here's my thoughts
Moving forward: Remember that people will fix the automatic vectorisations if they are off - they can also add extra buildings if need be also. I think we have enough to move it forward and see what happens. As the NYPL Building Inspector says: "Don't let perfect be the enemy of good" Branding: Yes I think it should be branded an OHM project - but with space for donors and supporters particularly if other organisations apart from NLS want to get involved. I've also forked the project into the OpenHistoricalMap repo https://github.com/OpenHistoricalMap/building-inspector as I think that's the best place for it (not sure why I didn't do that at first, tbh) cheers, Tim On 1 June 2014 18:25, Rob Nickerson <[email protected]> wrote: > Hi All, > > An update on progress deploying our own version of NYPL's historic map > vectorizer/building inspector tool [1]. > > > 1. Chris Fleet from National Library of Scotland (NLS) has kindly > provided a couple of GeoTiff example scans from their London 1890's maps > [2]. > 2. Using the NYPL map-vectorizer [3] I am able to get initial building > outlines from these maps. > 3. Tim Waters has managed to get a copy of the NYPL website up ready > for loading NLS's maps/vectorized buildings. This is at [4]. Meanwhile he > has opened initial conversations with the British Library who also have a > good collection of historic maps. > 4. I am concerned that the initial building outlines end up leaving > gaps between terraced buildings. This is due to the way that the NYPL > map-vecotrizer works to trace the _inside_ of buildings. I'm no GIS expert > so may be missing a simple solution. However I have noticed that we could > use the Strava Slide tool [5] to 'slide' the building polygons onto the > building walls. In essence this works by using pixel "blackness" of the map > scan (rather than GPS traces as per the initial Strava Slide tool). > 5. I have contacted Paul at Strava to ask about this. He thinks the > idea is a really good one and is hoping to add the functionality we will > require. He's a bit busy at the moment but is presenting at FOSS4G (in > September?) and would like to use this as an example of what's possible > with slide. > > So, where does this leave us? Well we're at the same place as NYPL so > could go ahead with adapting the website Tim put up to our needs and then > launch when ready. Or, we could hold off until Paul at Strava is able to > add the functionality we need to the Slide tool. > > Thoughts? > > Also, are folks happy for this to be branded as an OpenHistoricalMap > project? (Chris at NLS is okay with this). > > Regards, > Rob > > [1] http://buildinginspector.nypl.org/ > [2] http://maps.nls.uk/os/london-1890s/index.html > [3] https://github.com/NYPL/map-vectorizer > [4] http://leatherwood.herokuapp.com/ > [5] http://labs.strava.com/slide/ >
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