Filtering Arrays in MapLibre
Techniques for Substring Matching in MapLibre GL JS and Mapbox GL JS
Tech Blog | Read More →
Moonville 20250907
Elevation Change: 89.1 ft
Max Elevation: 213.93 ft
Total Time:
Get Audio Info using ffmpeg
ffprobe \
-v error \
-select_streams a:0 \
-show_entries stream \
-of default=noprint_wrappers=1 \
"input.m4a" | sed 's/=/:/'
Batch Convert Audio with ffmpeg
for f in *.flac; do ffmpeg -v warning -i "$f" -map_metadata 0 -b:a 192k "${f%.flac}.mp3"; done
Update for May 2025
A look back on what I've been up to over the past four months.
Updates | Update →Update for January 2025
A look back on what I've been up to since my last update.
Updates | Update →ShpShifter
Preview, Convert, and Filter SHP, GPKG, GeoJSON & GeoParquet in the Browser
Tech Blog | Read More →
Mapping Disasters
Find Open Satellite Imagery from Maxar, Capella, Umbra, and Wyvern
Tech Blog | Read More →
Palisades Fire Before and After
A Sample of Available Satellite Data for Post-Disaster Visual Assessment
Tech Blog | Read More →
Disposing an OpenLayers Map
const layers = map.getLayers().getArray();
layers.forEach((layer) => {
const source = layer.getSource();
if (source && source.dispose) {
source.clear();
source.dispose();
}
if (layer.disposeInternal) {
layer.disposeInternal();
} else if (layer.dispose) {
layer.dispose();
}
map.removeLayer(layer);
});
const olCanvas = map.getViewport().querySelector("canvas");
if (olCanvas) {
const gl = olCanvas.getContext("webgl") || olCanvas.getContext("webgl2");
if (gl) {
const loseContext = gl.getExtension("WEBGL_lose_context");
if (loseContext) {
loseContext.loseContext();
}
}
}
map.getInteractions().clear();
map.getOverlays().clear();
map.dispose();
map.setTarget(null);
Refactor Web Journal
undefined | Read More →Deck GL and 3D Tiles
Generate Colorized 3D Tiles from LiDAR and Ortho Imagery
Tech Blog | Read More →
Introducing Ancestral Audio
undefined | Read More →Finding Perpendicular lines with TurfJS
Bearing, LineIntersect & Destination
Tech Blog | Read More →
MapCompare
Rendering Comparisons of Vector Tiles and COGs in Web Mapping Libraries
Tech Blog | Read More →
col path 1
Elevation Change: 27.6 ft
Max Elevation: 253.6 ft
Total Time: 119 min
Afternoon Ride (1)
Elevation Change: 22.1 ft
Max Elevation: 241.4 ft
Total Time: 124 min
Serverless Web Maps
Using SQLite in the Browser and Service Workers to Power Web Maps from Object Storage
Tech Blog | Read More →
Walnut Woods
Elevation Change: 22.89 ft
Max Elevation: 240.59 ft
Total Time: 40 min
City of Lancaster Public Transit
A NodeJS GTFS Feed & Interactive Map Generator
Tech Blog | Read More →
Peaks 3D Visualization
An Exporation of the Highest Mountain Peaks in the US
Tech Blog | Read More →
Export GeoJSON from PostgreSQL using Beekeeper Studio
Query > Download > Copy > Paste!
Tech Blog | Read More →
Lake Vesuvius Lake Trail II 20211031
Elevation Change: 111.49 ft
Max Elevation: 274.3 ft
Total Time: 126 min
Lake Vesuvius Backpack Trail 20211030
Elevation Change: 133.53 ft
Max Elevation: 308.21 ft
Total Time: 325 min
Lake Vesuvius Lake Trail I 20211029
Elevation Change: 93.46 ft
Max Elevation: 260.14 ft
Total Time: 141 min
FOSS4G Image Processing
Creating Cloud Optimized GeoTIFFs and Raster Tiles using GDAL and QGIS
Tech Blog | Read More →
Generating Cloud Optimized GeoTIFFs and Raster Tiles with GDAL
TL;DR gdalbuildvrt, gdal_translate, gdal_warp and gdaladdo
Tech Blog | Read More →
Pandemix Data Visualization
What if all US COVID Deaths occurred in one geographic area?
Tech Blog | Read More →
Alley park II 20201025
Elevation Change: 108.78 ft
Max Elevation: 252.52 ft
Total Time: 79 min
Alley Park 20201025
Elevation Change: 66.7 ft
Max Elevation: 248.47 ft
Total Time: 59 min
From the Ashes of Shapefiles
A Presentation for the 2020 Virtual Ohio GIS Conference
Tech Blog | Read More →
Exporting AGOL Feature Services to GeoJSON
Using NodeJS and Batches to Transform an ArcGIS Online Feature Service to GeoJSON
Tech Blog | Read More →
Ohio COVID-19 Dashboard
A Simple, Client Side Tracking Dashboard for COVID-19 in Ohio
Tech Blog | Read More →
Highlighting Features in Mapbox GL JS
A Comparison of Filter and Feature-State
Tech Blog | Read More →
Network Tracing with Turf JS
A Client Side Solution for Simple Upstream and Downstream Linear Network Analysis
Tech Blog | Read More →
Leaflet Store Locator
A Leaflet Version of the Original Mapbox JS Store Locator Example
Tech Blog | Read More →
Data-Driven Styling, 3D Polygons & Vector Tiles with Mapbox GL JS
Tech Blog | Read More →
Banks of the Ohio
folk songs
Danville Girl
folk songs
East Virginia
folk songs
Shagbark Product Locator Map
A Locator Map with Search and Nearest Store Finder
Tech Blog | Read More →
Hosting a GeoJson on GitHub
Tech Blog | Read More →MS Ride 2014 Day 2
Elevation Change: 93.5 ft
Max Elevation: 299.9 ft
Total Time: 172 min
Streets of Laredo
folk songs
.jpg)
Hold You
veil
Riverstone
veil
Veil
veil
Words Of Love
veil
Words Of War
veil