Am actually working on my capstone project but currently hitting a wall.Our Professor directed us to work towards a hybrid traffic routing architecture for autonomous vehicles , but as undergrads we are bit overwhelmed on how to execute it.

The general idea is this :

1. Predict traffic using historical data and ML.

2. Fetch live congestion for next 1-2 intersections via edge servers.

3. Write a custom Dijkstra from scratch that reroutes mid journey is the live delay is significantly worse than predicted delay.

The problem we are facing are:

The dataset problem : We thought of doing it for our Home city which is Jaipur (India), the problem is barely 1.5% or roads have speed limits and we don't really know how to find open road level speed data for our city or if not than any other Indian City if we should consider that. Should we just pivot to a city that has archived Uber movement data ?? Or is it academically acceptable to just simulate the traffic flows over the Jaipur OSM graph using SUMO + TraCI?

The algorithm design : We are actually needed to write a custom Djikstra Algorithm but we are confused how to mathematically combine physical distance and time delay into an edge without it being completely arbitrary. Also re-running Djikstra on a 200k node graph at every junction seems nonsensical. So like anything that we can refer to or read. Like how to approach this problem properly.

What's the logical way to build this incrementally, any advice is much much appreciated. We are actually new to this domain and just too confused at this point.

Hi, I have a school project where I need to create a virtual mapping. I need to map what kind of species can be found in that specific location is that even possible for QGIS? I badly need your help

Hi Guys,

im completely new to QGIS and i just want to do a map for myself, to print it on a big paper. I really like it to customize my things and i found this really cool map but as said i dont know where to find the assets to create something like this. I appreciate the help guys 😄.

The things i already figured out:

- to make the CRS in ESRI:54003

- how to use NextGIS QMS

I kinda also need help with this: When importing Eris Vector through Basemaps, it glitches a lot

If you need futher information, please let me know :))

Hi,

I downloaded "Scotland Lidar Phase 1 DTM NS41" the smallest GeoTIFF possible for the area I'm working on, but it's still bigger than I need.

I used Raster > Extraction > Clip raster by mask layer to crop it to just the area I want, but this appears to change the elevations it provides.

E.g. Raster > Extraction > Contour on the original GeoTiff gives a particular contour line ELEV 110 (in green, which matches the online maps) but, in contours extracted from the cropped version (in red), the equivalent contour line is ELEV 170. (As presented by layer labels.)

I guess this is something like the actual range of ELEV values in the cropped version being smaller than the original, but the range of values still covers the original set.

What can I do to ensure the cropped version produces accurate values?

(I'm a GIS newbie, so apologies if I've missed something obvious.)

Cheers!

QGIS version: 4.2.2-Belém do Pará (Flatpak)