Hello people, I have finished a personal project of mapping landuse in Greater London from yahoo imagery. The inner section (roughly underground zone 1) cannot be usefully mapped from yahoo since all the buildings look the same - houses don't have gardens that are discernible. Outside zone 1 to the M25, the map benefits from land use data. The effort has been on and off work since mid 2007 until yesterday! It took a while... I am surprised that people don't comment on how odd the map looks without landuse being assigned and work to rectify it. I also found many missing roads and other interesting features. I started in Dartford and worked roughly clockwise to get to Romford. I know people like to have highly accurate OSM mapping, but users also expect good coverage. That allows users to say "where the map is blank, there is nothing there". This is not very compatible with a typical mapper thinking "where a map is blank is where I should go mapping". The latter view is not sustainable as we move towards good coverage. We need other tools to track progress rather than coverage. Using source tags appropriately helps a great deal.
Of course I did not do it all, so thanks for those who did land use in this area. I hope people can use it as a basis for refinement based on local knowledge and survey. The next step is to collect landuse data for the central area. I suspect if people used their local knowledge, a significant amount could be done with little effort. An alternative is to estimate it based on the features and road layouts, but this is would not be very accurate. Or does anyone have a better idea? Possibly a series of land use mapping parties for central London? Regards, TimSC PS I have not done anything on tracing buildings recently, but I probably will soon. _______________________________________________ Talk-GB mailing list [email protected] http://lists.openstreetmap.org/listinfo/talk-gb
