Feature #574
Updated by Stefan Eichert over 8 years ago
Whitepaper Geometries Content Topics: Concept 1. What types of physical things with locations are there according to the sources 1a. How exactly - only polygons or fuzzy is their extend defined 1b. Which various possibilites can be observed regarding the identification of an physical object with a spatial position point and line, too? Technical Basics 2. What types of geometries are needed to map the spatial extend/position of the objects To do: Technical Details 3. Tables used - possibiltiy to represent the objects and their location draw multiple polygones (without holes) 4. Queries and Triggers used to update/delete/insert additional/needed information. UI and Userinput 5. Buttons and forms 5.1. Add Geometry What types of physical things with locations are there according to the sources What we have in the sources (archaeological/written): -roads/routes/rivers --to be displayed as lines/corridors - certainty dropdown -physical things with fixed location (settlements, buildings, regions) --to be displayed as points/polygons Thoughts Stefan: -physical things within larger administrative units --to be displayed as point/polygons UI: what to draw: 1. Point: centerpoint of location. Drawn by user 2. Polygon: a) Shape of physical thing b) area in which physical thing is located Backend: what to create: if Polygon is drawn/updated GIS-centerpoint should be triggered 3. Line: a) exactly known route b) corridor in which route lies Polygons all at once possible in any combination defined by a certain type or subtype Types: Area of possible localisation (with a certain probability, defined by user) Shape of place: E.g. the outline of a village, a building... = you are certain about the localisation Corridor Polygon: Boundaries of a possible route.. Route must lie within the corridor. Fake: Tools and lines: very small/thin polygons To discuss: more than 1 possible location of 1 physical thing Probability/Certainty of location Centerpoint of place: E.g. the point where a strayfind has been found, like a localisation via GPS... How to implement: 1-n connection from place (E53-localisation of place) to postgis table - geometry collection or various tables? Probably better with geometry collection -- all in one table to be continued...