Re: [OSM-dev] Truncating geometries
On 09/11/2015 16:12, Sebastian Kürten wrote: I recently published a new project called osm4j which can be used to achieve this. This looks very interesting, especially as the application I need it for is also Java. I will read your documentation carefully! ___ dev mailing list dev@openstreetmap.org https://lists.openstreetmap.org/listinfo/dev
Re: [OSM-dev] Truncating geometries
Hi Malcolm, I recently published a new project called osm4j which can be used to achieve this. The wiki [1] already contains pointers to resources about the project. The tutorial [2] may be helpful as well, espescially the sections about building geometry [3] and about applying polygon operations [3]. Basically the library allows you to build JTS objects from ways and relations (LineString, Polygon and MultiPolygon) and apply the operations from the Geometry [5] class to do intersections with arbitrary polygons. Sebastian [1] http://wiki.openstreetmap.org/wiki/Osm4j [2] http://www.topobyte.de/tutorials/osm4j/index.html [3] http://www.topobyte.de/tutorials/osm4j/building-geometry.html [4] http://www.topobyte.de/tutorials/osm4j/using-polygon-operations.html [5] http://tsusiatsoftware.net/jts/javadoc/com/vividsolutions/jts/geom/Geometry.html On Mon, 9 Nov 2015 09:00:28 + Malcolm Herring wrote: > Are there any tools out there that will properly truncate ways & > multipolygons at bounding box boundaries, keeping closed ways & > mutipolygons as properly formed areas? > > > ___ > dev mailing list > dev@openstreetmap.org > https://lists.openstreetmap.org/listinfo/dev ___ dev mailing list dev@openstreetmap.org https://lists.openstreetmap.org/listinfo/dev
Re: [OSM-dev] Truncating geometries
Malcolm Herring wrote > Are there any tools out there that will properly truncate ways & > multipolygons at bounding box boundaries, keeping closed ways & > mutipolygons as properly formed areas? > > > ___ > dev mailing list > dev@ > https://lists.openstreetmap.org/listinfo/dev The tile splitter for mkgmap http://www.mkgmap.org.uk/doc/splitter.html is able to extract all data from a planet file which is relevant for a given bounding box. That means it can be configured to write all relations and ways which may touch the bbox or enclose it without having any point in the bbox itself. The output is OSM format , but you still need a tool which truncates each line / area. The code for mkgmap could be a base for that, but I guess there are other tools which are not that specialized and therefore easier to adapt. Gerd -- View this message in context: http://gis.19327.n5.nabble.com/Truncating-geometries-tp5859440p5859450.html Sent from the Developer Discussion mailing list archive at Nabble.com. ___ dev mailing list dev@openstreetmap.org https://lists.openstreetmap.org/listinfo/dev
Re: [OSM-dev] Truncating geometries
Hi, On 11/09/2015 10:00 AM, Malcolm Herring wrote: > Are there any tools out there that will properly truncate ways & > multipolygons at bounding box boundaries, keeping closed ways & > mutipolygons as properly formed areas? Not to my knowledge. You'd have to convert to shape files and then use ogr2ogr (or similar) to achieve that. Of course nothing keeps you from running something like shp2osm or polyshp2osm on the resulting shape file, generating a pseudo-OSM file again... Bye Frederik -- Frederik Ramm ## eMail frede...@remote.org ## N49°00'09" E008°23'33" ___ dev mailing list dev@openstreetmap.org https://lists.openstreetmap.org/listinfo/dev
[OSM-dev] Truncating geometries
Are there any tools out there that will properly truncate ways & multipolygons at bounding box boundaries, keeping closed ways & mutipolygons as properly formed areas? ___ dev mailing list dev@openstreetmap.org https://lists.openstreetmap.org/listinfo/dev
