A few weeks ago I thought I should write something about my views on landuse.<div>They flicker between liking landuse and disliking. Also should they share nodes with roads or be independent of anything else.</div><div><br>
</div><div>Overall I like them now an see reason for them, even in a finished map database. What if I want to make a map that doesn't care about navigation (or at least local navigation), a lot of maps just draw grey blobs where there are built up areas (aka the landuse in OSM). I would like to create a map of just landuse (okay maybe with water and parks to get your bearings) to show what it looks like.</div>
<div><br></div><div>I am fixing up the landuse you did in my suburb, but my editing has to pass across to add housenumbers anyway!</div><div><br></div><div>I will try and write up all my thoughts soon.</div><div><div><br>
<br><div class="gmail_quote">On 25 May 2010 11:32, TimSC <span dir="ltr"><<a href="mailto:mapping@sheerman-chase.org.uk">mapping@sheerman-chase.org.uk</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
Hello people,<br>
<br>
I have finished a personal project of mapping landuse in Greater London<br>
from yahoo imagery. The inner section (roughly underground zone 1)<br>
cannot be usefully mapped from yahoo since all the buildings look the<br>
same - houses don't have gardens that are discernible. Outside zone 1 to<br>
the M25, the map benefits from land use data. The effort has been on and<br>
off work since mid 2007 until yesterday! It took a while... I am<br>
surprised that people don't comment on how odd the map looks without<br>
landuse being assigned and work to rectify it. I also found many missing<br>
roads and other interesting features. I started in Dartford and worked<br>
roughly clockwise to get to Romford. I know people like to have highly<br>
accurate OSM mapping, but users also expect good coverage. That allows<br>
users to say "where the map is blank, there is nothing there". This is<br>
not very compatible with a typical mapper thinking "where a map is blank<br>
is where I should go mapping". The latter view is not sustainable as we<br>
move towards good coverage. We need other tools to track progress rather<br>
than coverage. Using source tags appropriately helps a great deal.<br>
<br>
Of course I did not do it all, so thanks for those who did land use in<br>
this area. I hope people can use it as a basis for refinement based on<br>
local knowledge and survey.<br>
<br>
The next step is to collect landuse data for the central area. I suspect<br>
if people used their local knowledge, a significant amount could be done<br>
with little effort. An alternative is to estimate it based on the<br>
features and road layouts, but this is would not be very accurate. Or<br>
does anyone have a better idea? Possibly a series of land use mapping<br>
parties for central London?<br>
<br>
Regards,<br>
<br>
TimSC<br>
<br>
PS I have not done anything on tracing buildings recently, but I<br>
probably will soon.<br>
<br>
<br>
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</blockquote></div><br><br clear="all"><br>-- <br>Gregory<br><a href="mailto:osm@livingwithdragons.com">osm@livingwithdragons.com</a><br><a href="http://www.livingwithdragons.com">http://www.livingwithdragons.com</a><br>
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