Suzan - I would like to hear from others. Here are my newbie thoughts: ONE Small structures that may not be houses: This may depend on the project. For #1018, Nepal Detailed Mapping 2nd Pass, the instructions are to tag buildings as building=yes rather than as 'house'. So I have included some small buildings that may not be houses. In a village with many obvious houses I include less of the smaller buildings, which is inconsistent but seems reasonable given the time crunch.
TWO Geologic structures that may appear to be buildings: I make a judgement call on these, but if I can't distinguish straight edges then I generally don't include it. THREE Changing other's work I have changed others' work. For example, a way tagged as highway=track when it really appears to be just a path, I may change it to 'path'. However, I check the tags first to see if there's a source, in which case I don't change it. I correct triangle buildings as they could be confusing (the JOSM buildings_tools plugin does make it much easier to enter rectangular buildings). FOUR Exact building shape For larger buildings with unusual shape I correctly entered the shape. But generally I just put in a rectangle for what I assume is the main building. I put myself in the position of the map user - if they can figure out which building is which, I figure that's enough. FIVE Residential vs. all houses marked Project #1018 *revised* instructions are explicit: "Trace ALL individual buildings and tag it as building=yes. For clusters of building, DO NOT enclose the whole area as one building. It is important to trace individual structures for future damage analysis." So I have been correcting enclosed 'residential' areas with no building outlines. Your project may differ, but I would expect consistency across most Nepal mapping projects. SIX Up to date BING images? Good question - the imagery date is apparently not available for some imagery (odd). I have read that the JOSM context (right-click) menu option to "Show Tile Info" will show the Bing imagery date, but it does not work for me. When I "Show Tile Info" nothing happens. This link indicates it should show the capture date: http://josm.openstreetmap.de/ticket/8573 Steve On Thu, Apr 30, 2015 at 7:52 PM, john whelan <[email protected]> wrote: > small buildings building=yes, let some on the ground say its a house etc. > > If a building is not a triangle then change it to a rectangle. JOSM > building tool is fast and very easy to use. > > Some projects want all buildings, some want residential areas and > highways, all buildings are nice but there is a lot of ground to cover so > read the instructions first, if you can get away with residential areas > rather than buildings according to the instructions go for the residential > areas and get more ground mapped in the same time. > > Cheerio John > > On 30 April 2015 at 19:39, Suzan Reed <[email protected]> wrote: > >> >> ONE Small structures/houses >> In remote areas, lightly populated, it's difficult to see if a small >> structure is a house or something else. I am labeling them all "house". Is >> this correct? People live in tiny places in Nepal, less that 25' square. >> They are hard to discern. If it looks like a building, I mark it as a >> house. Is this good? >> >> TWO Geologic structures >> It is difficult to tell geologic structures from houses in some cases. I >> look to see if there are similar structures in the landscape, if there are >> fields or agriculture, then mark it as a house as I have been erring on the >> side of marking houses and having people recognized as being there than >> not. I want everyone on the map. This may mean I've made mistakes and it's >> a huge boulder with a shadow. Comments? >> >> THREE Changing other's work >> Also, some of my colleagues have marked houses with triangles, not >> rectangles. Can I correct these? >> >> FOUR Exact building shape >> Is the shape of the building important? It's often difficult to tell if >> it's part of the house or an outbuilding or a shed near the house. Knowing >> there are people living there seems more important, but if the actual shape >> is important, I will go back and redo my work. >> >> FIVE Residential vs. all houses marked >> Many remote villages are simply marked with a polygon Residential Area. >> Should I add the structures to these areas? >> >> SIX Up to date BING images? >> Also, how recent are the Bing images? In remote areas, much could have >> been lost to landslides. I also come across areas with clouds. I can go >> back and map these if the images are refreshed. >> >> >> >> _______________________________________________ >> HOT mailing list >> [email protected] >> https://lists.openstreetmap.org/listinfo/hot >> > > > _______________________________________________ > HOT mailing list > [email protected] > https://lists.openstreetmap.org/listinfo/hot > >
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