Marco, Is your earlier code available in a repository somewhere? I'd love to get a head start on the functions.
Claude On Sat, Jan 6, 2024 at 12:43 PM Marco Neumann <marco.neum...@gmail.com> wrote: > 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 > -- LinkedIn: http://www.linkedin.com/in/claudewarren
