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7

If I wanted some ready-to-go building footprints, I'd start calling county Assessor offices and city planning departments. I think they will be your best bet for ready-made building footprint polygons. However because these are expensive data, I believe it's rare to find them free for the taking. It's likely even rarer to find it associated with ...


6

There are a number of places where footprints can come in very handy Public Sector: Taxation: As @Mapperz said, taxation is one area. The percentage of property that is built on is sometimes used as a tax criterion. Planning: Knowing where structures already exist on property can help in the planning process due to applied setbacks and minimum ...


3

There are many options for you in ArcGIS, however I would stay open to open-source solutions too. You can purchase an extension for ArcGIS called Feature Analyst, which uses a feature extraction algorithm. Otherwise, try Iso Cluster Unsupervised Classification (Spatial Analyst) on 4-band DOQ's (Earth Explorer). Once you find the right recipe for ...


3

I don't know there is any way to automate such process by using ArcGIS. But I strongly recommend you to check out one software which name is eCognition developed by Trimble. eCognition is based one the idea of object oriented classification; it builds up a picture iteratively, recognizing groups of pixels as objects. It uses the color, shape, texture and ...


3

Does Chicago belong to a council of governments? Often a COG facilitates LiDAR contracts by pooling together funds from participating municipalities. Otherwise you might try the City of Chicago's GIS department: GISTeam@cityofchicago.org


2

Not all cities have this data. There is generally a fee associated with acquiring it. It is generally beyond the resources of most cities to develop this data themselves. If a city does possess this data it is usually acquired through the County/Parish or Metropolitan Planning Organization/Council of Governments that the city belongs to. You may want to ...


2

Well this is almost certainly against Google's Terms of Service, so I'm definitely not recommending it, but I found an interesting method of extracting Google Earth building models to OBJ files here: Google Earth to OBJ Using GLIntercept If you can wait, the Singapore Land Authority is reportedly in the process of developing a 3D togographic dataset. I ...


1

You can can try downloading the Japan OpenStreetMap data at Geofabrik. You can choose between pbf, bz2 or zipped shapefiles. It should have the files you need. Good luck :)


1

You can add the old repository where have plugins out in Official Repository. http://pyqgis.org/repo/contributed The image boundary plugin have option for calculate valid pixel, but, the image need be the full scene, how CBERS or Landsat, where this process calculate the first 4 corners. The image need have nodata with ZERO value for area without ...


1

I think it will be difficult to get a satisfactory result, especially just using Model Builder. I think you will have to investigate scripting this. One approach you could try is to use Hawth's tools to populate your parcels with a number of points at your density, setting the point-to-point separation and separation from the polygon edges appropriately. ...


1

Your best bet for currently available data is to use Kent County Parcel Shapefiles which include Michigan Property Tax Codes that seem to correspond with this document. It seems like Kent County does have information on building footprints judging from this document, but they don't make it readily available. You could try asking for the information from the ...


1

Use the ST_Envelope function: SELECT ST_Envelope(rast) FROM raster_table; This will return a rectangular bounding box for your raster(s). PostGIS describes what this function returns as: Returns the polygon representation of the extent of the raster.


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Albania http://tpginc.net/gis/albania/albania.php Bosnia http://www.cartographic.com/xq/asp/bosnia/and/herzegovina/gis/data/navmode.r/rid.47/tid.8/sid.0/cid.0/vid.0/oid.0/qx/hub/index.asp Macedonia http://www.gisdata.com/Default.aspx?sec=684


1

Openstreetmap would be a good place to explore first. Then I would recommend going looking at each countries statistical/data office, and then each city that you are interested. There are a few other questions on this site about global data which may be of use.



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