small tRifles

Highway with from LIDAR data - proof of concept

news
code
analysis
R
The idea of enhance OSM data with highway width came a long ago.1 But instead of using a ortho-photo my aim was to use airborne LIDAR points for analysis. Airborne LIDAR…
Jun 19, 2025
Grzegorz Sapijaszko

 

Cycling infrastructure in the town

Mapping with OpenStreetMap
cycling
OSM
openstreetmap
R
Another post inspired by questions on SE, see here or here. And great opportunity to explore tagging of bicycle related features in OpenStreetMap. An example based on…
Dec 18, 2022
Grzegorz Sapijaszko

Smoothing of water areas of DTM using ALS points

R
DTM
smoothing
delineate
LIDAR
ALS
When creating a Digital Terrain Models from LIDAR data, there are discontinuities (absence) of points over areas with water. Algorithms try to approximate missing points…
Nov 13, 2022
Grzegorz Sapijaszko

Where to find altitude for my coordinates?

R
OpenData
DEM
Looking for a DEM elevation model for entire UK - not in tile form is the query on Open Data StackExchange that prompted this post. The initial question was:
Oct 2, 2022
Grzegorz Sapijaszko

R, PostGIS and OSM data

R
spatial analysis
openstreetmap
The State Forests in Poland designated special forest areas where visitors are allowed to camp overnight.1 In total, it has more than 1300 such regions with area of 65 000…
Sep 9, 2022
Grzegorz Sapijaszko

On bike around chimney

R
rStrava
leaflet
maps
Nothing special, just a few words from last cycling. And a way to show the track and couple of photos on the map.
Feb 7, 2022
Grzegorz Sapijaszko

OSM data within R

R
openstreetmap
maps
OpenStreetMap — free and open geographical data from the whole world on hand. How to access it, how to work with it, and finally — how to display it.
Feb 5, 2022
Grzegorz Sapijaszko
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