Blog

Posted January 17, 2025

Palisades Fire Before and After

A Sample of Available Satellite Data for Post-Disaster Visual Assessment

Posted November 4, 2024

Deck GL and 3D Tiles

Generate Colorized 3D Tiles from LiDAR and Ortho Imagery

Posted December 24, 2023

Finding Perpendicular lines with TurfJS

Bearing, LineIntersect & Destination

Posted August 18, 2023

H3 Grids Explorer

A Web Tool for Exoploring H3 Grid Levels

Posted January 29, 2022 | Updated January 4, 2024

Export GeoJSON from PostgreSQL using Beekeeper Studio

Query > Download > Copy > Paste!

Posted September 16, 2021

FOSS4G Image Processing

Creating Cloud Optimized GeoTIFFs and Raster Tiles using GDAL and QGIS

Posted September 2, 2021 | Updated November 26, 2023

Generating Cloud Optimized GeoTIFFs and Raster Tiles with GDAL

TL;DR gdalbuildvrt, gdal_translate, gdal_warp and gdaladdo

Posted September 21, 2020

From the Ashes of Shapefiles

A Presentation for the 2020 Virtual Ohio GIS Conference

Posted September 20, 2020

GIS and Remote Work

An Exploration of a GIS Remote Work Toolkit

Posted April 27, 2020 | Updated September 18, 2023

Exporting AGOL Feature Services to GeoJSON

Using NodeJS and Batches to Transform an ArcGIS Online Feature Service to GeoJSON

Posted April 1, 2020 | Updated September 12, 2020

Ohio COVID-19 Dashboard

A Simple, Client Side Tracking Dashboard for COVID-19 in Ohio

Posted November 28, 2019

RTK to WGS84

Transforming Coordinates with JavaScript using proj4.js

Posted November 17, 2019

Highlighting Features in Mapbox GL JS

A Comparison of Filter and Feature-State

Posted July 12, 2019

Network Tracing with Turf JS

A Client Side Solution for Simple Upstream and Downstream Linear Network Analysis

Posted May 10, 2019

Progressive Web Apps

Using PWA Components for Web Maps

Posted April 5, 2019

Open Parcel Viewer

A Client-Side Parcel Viewer built with Leaflet

Posted April 5, 2019

Leaflet Store Locator

A Leaflet Version of the Original Mapbox JS Store Locator Example

Posted September 9, 2018

Intro to Turf JS

Geospatial Analysis for the Browser, Desktop & Server

Posted February 12, 2018 | Updated April 11, 2019

Mapping with Vector Tiles

Query Features Outside the Viewport

Posted September 14, 2017

Data-Driven Styling, 3D Polygons & Vector Tiles with Mapbox GL JS

Posted May 16, 2017

Web Maps from Scratch

An Introduction to Leaflet, GitHub & Jekyll

Posted November 16, 2016

What is a Map?

Marshall Univerity 2016 GIS Day Keynote

Posted September 30, 2016

Beyond the Desktop

Open Source Experiments in Web Mapping

Posted August 13, 2016

Jekyll, Leaflet and TurfJS

Open Source Tools for Web Mapping

Posted January 24, 2016

Leaflet & GeoJson Tiles

A County Parcel App: No GIS Server? No Problem!

Posted December 18, 2015

CartoDB Visualizations

One Data Set Four Ways

Posted December 3, 2015

A Modern Leaflet Toolbar

Horizontal Toolbars in Leaflet

Posted October 12, 2015 | Updated April 9, 2019

Conkle's Hollow Fall Hike

Mapping GPS Tracks with Leaflet

Posted September 20, 2015

Intro to Leaflet

A Presentation for the 2015 Ohio GIS Conference

Posted July 13, 2015 | Updated October 27, 2018

Leaflet Photo Map

A Trip Out West circa 1985

Posted November 19, 2014

Hosting a GeoJson on GitHub