Blog

I write a few times a month about GPXZ as well as elevation data in general. Get notified about new posts with RSS.

GPXZ is a long-term business	2023-03-02
Japan elevation data guide	2022-02-03
Converting Japan DEM GML/XML files to geotiffs	2021-11-15
LERC compression benchmarks	2021-11-09
How LERC raster compression works	2021-11-03
PSA: Gratiot County 1m DEMs are in ft, not m	2021-10-29
Elevation accuracy of .gpx files	2021-10-27
Elevation data for exercise tracking apps	2021-10-20
Calculating elevation-adjusted calorie burn in Python	2021-10-13
Adding elevation to a .gpx file	2021-10-07
Loading a .gpx file into a Pandas DataFrame	2021-09-30
Fixing sparse .xyz files	2021-09-05
Sampling points along a lat,lon path	2021-09-04
lat lon lat lon lat lon	2021-08-06
Sampling geotiffs with zarr and tifffile	2021-07-16
Testing hack necessity	2021-07-06
Using rayshader in Python	2021-05-06
What causes differences between DEMs?	2021-05-03
Downloading the Copernicus DEMs	2021-03-29
Downloading USGS US DEMs	2021-03-29
Aligning rasters for inspection	2021-03-07
Aligning rasters for analysis	2021-03-03
Raster analysis workflow in numpy	2021-03-02
Paper: Fusing DEMs	2021-02-20
My notes from reading Nuth, C., & Kääb, A. (2011).	2021-02-20
Dashboard design	2021-02-19
Learning django	2021-02-17
My notes from reading 'The earth isn't flat'.	2021-02-12
My notes from reading 'Free and low cost datasets for international mountain cartography'.	2021-02-12
My notes from reading 'An evaluation of void filling interpolation methods for SRTM data'.	2021-02-09
Licenses used by elevation datasets.	2021-02-07
Taking responsibility for the GPXZ dataset.	2021-02-05
Using non-uniformity to tile a large elevation dataset.	2021-02-03
Alternative #2: Mapzen	2021-02-02
Alternative #1: SRTM.	2021-02-02
An idea	2021-02-01