[HOT] QGIS and OSM and..

Stefan Keller sfkeller at gmail.com
Mon May 11 21:31:58 UTC 2015


Hi Harrison

Have a look at http://market.weogeo.com/datasets/osm-openstreetmap-planet.html
and http://labs.geofabrik.de/nepal/
And if you can wait another two months then look for project Osmaxx...

-S.


2015-05-11 9:38 GMT+02:00 Springfield Harrison <stellargps at gmail.com>:
> Hello Phil & Michael,
>
>         Thanks for the quick reply, my apologies for not seeing the KML file
> you attached.  It opens fine in Manifold but only has text comments so
> querying for helipad is difficult.  However, just did that and got 17
> possible and probable helipads from the 1444 records.  How many tiles does
> that represent do you think?
>
>         I just noticed that you indicate around 1400 potential helipad
> sites.  However, only 17 are flagged as such and 1401 have no information in
> them whatsoever.  None of them have any key/value attributes, how were these
> records actually generated?  Can I assume that they are either
> aeroway/helipad or leisure/common?  It would be nice to know which is which.
> Have any been validated and how is that shown?  Sorry for all the questions
> but the pedigree for this file seems a bit sketchy.
>
>         Thanks for your comments.  You may be right about QGIS, I'm not that
> familiar with it but I know that it happily opens many of my local
> shapefiles with no issues.
>
>         Yes, JOSM was running under remote control but the transfer of data
> from turbo failed with cryptic error messages.
>
>         My intent, actually suggested by someone else from OSM, is to
> inspect existing helipad candidates, and possibly find more, using the
> better reconnaissance capabilities inherent in Google Earth.  I think it
> would be important to have the tile grid boundaries for that.
>
>         Anyway, this may or may not be a good idea but I thought it showed
> promise.  I will overlay your file on Google Earth tomorrow and let you know
> how things look.  It may not be right away as I am well behind on other
> things now.
>
>                  Thanks again to all, Cheers . . . . . . . . Spring Harrison
>
>
>
>
>
> At 10-05-2015 23:42 Sunday, Phil \(The Geek\) Wyatt wrote:
>
>
>
> From: Springfield Harrison [mailto :stellargps at gmail.com]
> Sent: Monday, 11 May 2015 3:43 PM
> To: Michael; 'HOT'
> Subject: Re: [HOT] QGIS and OSM and..
>
> Hello Michael,
>
> Thanks for your reply.
>
> So you are confirming that downloading OSM data through JSOM is a waste of
> time? I wish I had known this earlier. I was advised that it would download
> all of Nepal but that doesn't seem to be the case.
>
> JOSM is really just an editor for doing small area changes to OSM data - its
> not designed for country editing. QGIS however, can download any area in the
> world (subject to your bandwidth and hard disc size)
>
>
> I tried the open street map data link that you provided. It shows some
> promise but I haven't looked at the data yet. [Just looked at some of those
> shapefiles, they do load and display in QGIS. However, when I tried to
> change the symbology for the helipads, they all disappeared. WTF?]
>
> OK - thats likely a QGIS issue - nothing to do with OSM
>
>
> I also stumbled upon the HOT Export site. It is very convoluted but also
> shows promise once one figures out the myriad of options. Creating presets
> would be helped enormously if there were drop-down lists for the keys and
> their values. My last attempt here failed, probably due to bad
> capitalization or some such. It looks like a dog's breakfast.
>
> Now I see your reference to Overpass Turbo, hopefully not another blind
> alley. Simply downloading data in OSM is anything but streamlined. The
> key/value concept seems to complicate things considerably. What is the
> benefit of that system?
>
> I have fired up Overpass Turbo. Used the wizard to create and run a query
> but the export options only offers some less than useful choices. GPX and
> KML files are of limited use in a GIS and I don't recognize any of the other
> files. The geojson file was only recognized by QGIS but it would not
> display.
>
> Make sure JOSN is running (with remote control turned on) and then use the
> Overpass turbo export "load data into an OSM editor: JOSM , Level0". Then in
> JOSN you can edit away as required
>
>
> Then I tried the KML and GPX files. I'm QGIS the KML file was listed but not
> accepted for viewing; the GPX layers were accepted but would not display. In
> JSON the KML file was not recognized and GPX file would not display.
>
>
> Most of this sounds like QGIS issues/familiarity not OSM issues.
>
>
> If I recall correctly, the option to send the query results directly to JSON
> failed also.
>
> This is a huge amount of trial and error with very little, almost nothing,
> to show for two late nights. I appreciate everyone's attempt to help, and
> have read many wiki pages but she's all uphill.
>
> My intention is very simple -
> ·        download a shapefile of the Nepal task tiles
> ·        download a shapefile of the potential and actual helipads [this
> might have been achieved with the Hot Export, the many attempts are all
> blurring together now]
> ·        possibly download a shapefile of other features
>
> The question here is "what do you want to do with the data after you have
> it?" We can suggest the best tools if we know what the whole job actually
> is. I have sent you a KML file of Leisure=common sites (around 1400
> potential helipad sites) that you could use in Google Earth (as you
> previously mentioned that it would help you define better landing sites). I
> have also suggested how you can then edit them again via OSM.
>
> There is not a quick process to take masses of data out of OSM, edit it
> offline, and then reimport it with validation ...especially whilst there are
> so many folks editing during an activation.
>
> If someone can outline a GUARANTEED process to achieve that I would be most
> appreciative. In most GIS environments, these are everyday activities
> accomplished with a few mouse clicks. In many years, I don't think I have
> ever seen such a complex mishmash of GIS tools.
>
>
> Yep, each set of tools and software have their uses, foibles and learning
> curve - personally I use Mapinfo, QGIS, FME, OSM, JOSM Editor, ID Editor,
> Google Earth, Oziexplorer, Mapsource, Basecamp and occasionally even ESRI
> products (even Manifold years ago!). Sometimes a combination of tools gives
> the best result.
>
>
>         Thanks very much, Cheers . . . . . . . . Spring Harrison
>
>
>
>
> At 10-05-2015 10:33 Sunday, Michael wrote:
>
> Hi Spring,
>
> Am 10.05.2015 um 10:47 schrieb Springfield Harrison:
>
> Further bad news, trying to download OSM through JOSM yielded the following
> message:
>
> /The OSM server 'api.openstreetmap.org' reported a bad request.
>
> The area you tried to download is too big or your request was too large.
> Either request a smaller area or use an export file provided by the OSM
> community.
>
> I am afraid but this is standard behavior in any editor. Basically this is
> not the way to go if you actually want to download OSM data for consumption.
>
>
> /Does this process usually work? Is it not possible to simply get a
> shapefile
> of this information and avoid all the multiple file type rigmarole?
>
> If you actually want a shapefile for all of Nepal I would recommend using
> one of the available downloads listed on
> https://wiki.openstreetmap.org/wiki/2015_Nepal_earthquake#Exporting_OpenStreetMap_data
>
> But if you are only interested in some feature you should have a look at
> Overpass Turbo. This allows to download filtered results.
> http://overpass-turbo.eu/s/9hb is a sample query for aeroway=helipad in the
> area showed in the map. But unfortunately this will not yield shapefiles.
> Also the query language requires to go through some learning curve if you
> want to create a bit more complex queries.
>
> Cheers,
>         Michael (user Ohr)
>
>
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