yes, a lot of the geosparql functions will push you towards geo. It might be better to just reuse the existing low level functions. My first spatial implementation for Jena in 2006 made use of the JTS Topology Suite.
JTS is still used in Jena today to run some of the low level evaluation mentioned above but can also conveniently be used for X,Y data. I believe this might just do the job for your use case. Marco . On Sat, Jan 6, 2024 at 11:15 AM Claude Warren <cla...@xenei.com> wrote: > Background: I am building an "autonomous chair side table" for my wife. > The goal is to have the table carry her tea from the kitchen to whatever > room she is in. As part of this project I am building a reasoning system > that builds a map based on various inputs (that I call scanners). I store > all the data in an RDF graph, because all data is a graph and I need to be > able to annotate it in ways I have not discovered yet. > > So basically I get sensor data that tells me an obstacle appears at a > location. That goes into the system initially as a point, however > processing may group it with other points using a convex hull calculation > to convert a point cloud to an obstacle. > > I need to be able to determine if a path of a specific with (modeled as a > line with a rounded-end buffer) can traverse the space between 2 points > without touching the obstacles. > > So the functions I have been playing with are: > > - Geof.SF_OVERLAPS > - Geof.SF_INTERSECTS > - Geof.SF_TOUCHES > - Geof.DISTANCE_NAME > - SpatialExtension.NEARBY > > I may just revert to writing a couple of filter functions to do what I > want, but I was trying to learn the existing library. > > Claude > > On Sat, Jan 6, 2024 at 10:47 AM Marco Neumann <marco.neum...@gmail.com> > wrote: > > > In terms of geo you would talk about some sort of equidistant projection > > that is available via the CRS/SRS.This is currently implemented with > Apache > > SIS in Jena. > > > > But it sounds like geo isn't really your thing here, so in conclusion > > geosparql isn't either as it's all about geo data. > > > > What type of functions (access methods) would you like to perform on the > > data? > > > > > > > > On Sat, Jan 6, 2024 at 8:24 AM Claude Warren <cla...@xenei.com> wrote: > > > > > Yes just x and y on a flat surface. > > > > > > On Sat 6 Jan 2024, 00:45 Marco Neumann, <marco.neum...@gmail.com> > wrote: > > > > > > > Can you give an example? you just want to use x and y instead of > WGS84 > > > > coordinates? > > > > > > > > On Fri, Jan 5, 2024 at 11:28 PM Claude Warren <cla...@xenei.com> > > wrote: > > > > > > > > > I want to use the geospatial capabilities of Jena but without the > > > global > > > > > shape. I am looking for a planar geometry (flat, like a small > scale > > > > map). > > > > > Is there a way to specify this? > > > > > > > > > > Claude > > > > > > > > > > -- > > > > > LinkedIn: http://www.linkedin.com/in/claudewarren > > > > > > > > > > > > > > > > > -- > > > > > > > > > > > > --- > > > > Marco Neumann > > > > > > > > > > > > > -- > > > > > > --- > > Marco Neumann > > > > > -- > LinkedIn: http://www.linkedin.com/in/claudewarren > -- --- Marco Neumann
