Hi Hernán On Sat, Jul 25, 2015 at 4:54 AM, Hernán Morales Durand < hernan.mora...@gmail.com> wrote:
> Hi Arturo, > > Do you want to implement a Geolocator like NAC? > http://www.nactag.info/map.asp > Nope, just to count points for each different province. > > > The GADM world tree is built from a CSV which I generated from the GADM > 2.0 dBase files for the whole world. I checked the dBase format and doesn't > include the polygon information you find in the .kmz files. I saw they > released 2.5 this month (July 2015) but only in ESRI geodatabase format > (which I didn't investigated yet, but not the same as ESRI shapefile > format) and will release 2.7 in August 2015. > > Another way could be just to parse the KML (is just an XML file) using > XPath or XMLPullParser. > > Of course,thanks. I wanted to know if there were a library supporting KMZ, and doing some queries on the objects contained there. >From your reply and Sven's , I see there is no such library, but it seems very easy to implement that functionality. My only concern now is performance, I will try it and let you know. > About locating the point in a polygon the problem of traditional 2D > inclusion tests (ray crossing methods) is that require large storage, given > polygons of enough size, complexity and amount of edges. This is a common > situation with level 1 and 2 polygons. New methods for example classiffy > polygon edges into layers, results in faster inclusion test. > > Thanks again. best regards art > Hernán > > > > > 2015-07-24 20:19 GMT-03:00 Arturo Zambrano <arturo.zambr...@gmail.com>: > >> Hi All, >> I would like to get some advice regarding which path I should take. >> >> Problem: >> Given a coordinate I want to know to which geographical object it >> belongs to. >> >> Path 1 >> Using Glorp to make a query to a Postgis instance containing the >> boundaries of the geobjects >> >> >> >> Path 2 >> Use the data form GADM data (according to this thread >> <http://forum.world.st/PostGIS-in-Pharo-td4802233.html>). >> >> >> I would avoid path 1 in order to avoid installation of postgi. From the >> thread mentioned above, I thing that it requires some development. >> >> >> Regarding Path 2, I don't see which framework or library should I use to >> import and query the data contained in the KMZ from GADM. >> >> >> Any advice is welcome. >> >> Best regards. >> Art >> >> >> > >
