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Author

Mike O’Brien

O (T/U) MERC God

spatial
map projections
R
sf
A question was thrown into the ether a few days ago that gave me a reason to learn a little bit of R’s terra package. The answer, itself, turned out to be not overly…
Dec 19, 2023
Mike O’Brien

Creating custom FarmOS satellite tiles

FarmOS
Ubuntu
Self Hosting
Git
map tiles
satellite imagery
ArcGIS
REST
Henrico
Here’s an exercise: head over to Google Maps, find your house, and note how long ago those satellite pictures were taken. Chances are it has been a while. Most of the time…
Aug 21, 2023
Mike O’Brien

How to install a custom FarmOS module

FarmOS
Ubuntu
Self Hosting
Git
map tiles
satellite imagery
Docker
I’ve recently ventured into the realm of creating a home server, mainly to play around with a Linux operating system (I’ve only ever used Windows) and self-host some…
Jun 6, 2023
Mike O’Brien

Time series box plot using R’s ggplot2

R
ggplot2
chart junk
time series
Before you start, know that this one is firmly in the “chart junk” category.
May 25, 2023
Mike O’Brien

Varina LandLab LIDAR

R
lidR
sf
terra
rayshader
LIDAR
map projections
Henrico
spatial
The Varina LandLab is a parcel of land in Henrico County, VA acquired by the Capital Region Land Conservancy in 2021. Several Civil War battles were fought in the vicinity…
May 24, 2023
Mike O’Brien

Rotating polygons in sf

R
sf
map projections
ggplot2
The east coast of the United States spans nearly 20 degrees of longitude and 30 degrees of latitude, with a major axis that runs more “northeast-to-southwest” than…
Mar 31, 2023
Mike O’Brien

 

Connecting Google Sheets and GitHub Actions

R
Web scraping
GitHub Actions
Google
There are already a few blogs and presentations that outline the why and how of GitHub Actions and R:
Mar 10, 2023
Mike O’Brien

 

Introduction to GitHub Actions

R
GitHub Actions
Coding Club
This week, I wanted to talk to the Coding Club at UMCES about GitHub Actions. I had been messing around with them during the creation of the matos and otndo packages, and I…
Mar 7, 2023
Mike O’Brien

 

Creating a simple features object via well-known-binary vs using coordinates

R
Fish migration
biotelemetry
sf
spatial
PostGIS
If you work with fish telemetry data on the east coast of the USA, chances are that you’re now at least tangentially related to the Ocean Tracking Network (OTN).
Feb 28, 2023
Mike O’Brien

Elusive silver eel migrations detected in the Chesapeake mainstem for the first time

Chesapeake
Fish migration
biotelemetry
Note: This short essay was originally posted in the December 2022 Chesapeake Biological Laboratory newsletter.
Jan 25, 2023
Mike O’Brien

Age of Henrico County Virginia’s structures

R
Henrico
Web scraping
Land use
geoarrow
arrow
A recent tweet showed the age of the buildings in Groningen, Netherlands super-imposed on LiDAR data for some perspective.
Jan 22, 2023
Mike O’Brien
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