Thanks for those references. I understand the first one although it does certainly appear daunting.
The problem I see is that the long list of attributes/keys/values that are specified for inclusion in the shapefile can go out of date very often as crowd-mappers or new projects invent new key/value tags. Having to manually inspect the "other_tags" field looks like a bottleneck that could lead to unintended query results, most likely overlooking items that have new keys. This is a long list to keep up to date and there are quite a few of them in your example:
attributes=name,type,aeroway,amenity,admin_level,barrier,boundary,building,craft,geological,historic,land_area,landuse,leisure,man_made,military,natural,office,place,shop,sport,tourism
Anyway, I understand what you're driving at but the process seems to be overly complex and not given to reliable automation.
Has anyone created a GUI for this? Your example for hand wiring all these INI files looks tedious and easy to screw up. I can see that a query builder tool that presented all the keys and their values in pick lists along with the relevant operators would boost the reliability and ease the workload in creating these queries.
At 22-05-2015 06:55 Friday, Blake Girardot wrote:
Hi Springfield,
Here is how I get useful thematic layers out OSM:
http://wiki.openstreetmap.org/wiki/User:Bgirardot/How_To_Convert_osm_.pbf_files_to_Esri_Shapefiles
And here is an example files generated through what I would guess is a similar process every 30 mins:
http://nepal.piensa.co/
Actually, I see they use a slightly different process with the same basic method, and the same software for the conversion/extraction:
https://github.com/GFDRR/osm-extract
(feedback on my thematic layers is always welcome, we want to create the most useful layers we can. Examples can be found in the wiki entry for Vanuatu typhoon response)
cheers,
Blake
On 5/22/2015 8:26 AM, Springfield Harrison wrote:
Hello John,
Thanks for your patient explanation, I'm beginning to see that OSM is a
very different flavour of GIS. At the outset, my assumption was that it
was entirely emergency oriented. I was puzzled by the references to
hairdressers and gymnasiums but I guess they result from a different
process.
I do think that some emergency related features such as potential
helipads, powerline crossings, towers, cable cars, landslides, glacial
lakes, emergency shelters and such like might be better left to those
with experience with those types of features. They wouldn't necessarily
need to be experienced with OSM, just familiar with identifying those
features. I'm surprised that there is no process for identifying and
directing the more highly qualified mappers.
I had intended to help with the helipad project but quickly became
discouraged with the less than adequate imagery and the weirdness of
leisure = common. Merely verifying the leisure = common sites would
probably overlook lots of other qualified sites. And how many sites
with this tag are actually sports fields as per the original intention?
Then, mapping existing helipads marked with H in a circle, might be
redundant as such official sites would probably be already mapped by a
national agency. I would recommend that potential helipads be tagged as
aeroway = helipads_potential, verified = no. Proper assessment of
helipads requires an oblique, 3-D view. I attempted to introduce Google
Earth into the process but licensing fears put the kibosh on that.
I found this surprising because Google Earth does have several other
products and does make a lot of noise about community and not for profit
mapping without any references to licensing. They appear to actively
promote user generated files being placed into the public domain. I
have spent some time attempting to talk to them about this but the best
I could do was an e-mail. Will advise.
Thanks again for your time on this, I'm sure you have larger fish to
fry, Cheers . . . . . . . . Spring Harrison
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