Posted September 16, 2021 FOSS4G Image Processing Creating Cloud Optimized GeoTIFFs and Raster Tiles using GDAL and QGIS This is a talk I gave at the 2021 Ohio GIS Conference. It outlines an open source pipeline for creating Cloud Optimized GeoTIFFs and raster tiles f...
Posted September 21, 2020 From the Ashes of Shapefiles A Presentation for the 2020 Virtual Ohio GIS Conference This talk describes the slow and painful migration from a legacy GIS data structure of hundreds of shapefiles to a modern setup using a mix of Post...
Posted September 20, 2020 GIS and Remote Work An Exploration of a GIS Remote Work Toolkit In the aftermath of the Coronavirus pandemic, remote work may well be come the new normal, as businesses and government agencies discover that prod...
Posted April 27, 2020 Exporting AGOL Feature Services to GeoJSON Using NodeJS and Batches to Transform an ArcGIS Online Feature Service to GeoJSON Recently I had the need to pull data from ArcGIS Online into a Mapbox GL JS web map. While it would be possible to use the WMS publishing feature i...
Posted April 1, 2020 | Updated September 12, 2020 Ohio COVID-19 Dashboard A Simple, Client Side Tracking Dashboard for COVID-19 in Ohio Update: This visualization is no longer being updated. There are a wide variety of authoritative COVID-19 trackers on the internet, including o...
Posted November 28, 2019 RTK to WGS84 Transforming Coordinates with JavaScript using proj4.js In my day job we recently completed a project to field locate our water utility assets using a high-accuracy GPS unit. Now that this data is online...
Posted November 17, 2019 Highlighting Features in Mapbox GL JS A Comparison of Filter and Feature-State Creating a hover effect is a great way to add interactivity to web maps. In mapbox-gl there are two main methods to accomplish this feature: ...
Posted July 12, 2019 Network Tracing with Turf JS A Client Side Solution for Simple Upstream and Downstream Linear Network Analysis A primary focus of my day job is managing utility datasets for a small municipality. I am currently in the process of taking a simple database of l...
Posted May 10, 2019 Progressive Web Apps Using PWA Components for Web Maps The GitHub repository with all the code needed to follow along with this presentation can be found at ...
Posted April 5, 2019 Open Parcel Viewer A Client-Side Parcel Viewer built with Leaflet The Open Parcel Viewer is a client-side application written in plain javascript and jquery. It is capable of rendering up to 50k polygons on deskto...
Posted April 5, 2019 Leaflet Store Locator A Leaflet Version of the Original Mapbox JS Store Locator Example This simple, responsive store locator is based on the original Mapbox JS exampl...
Posted September 9, 2018 Intro to Turf JS Geospatial Analysis for the Browser, Desktop & Server This presentation was given at the 2018 Ohio GIS Conference. The NodeJS example is hard-coded from a real-world example in the original presentatio...
Posted February 12, 2018 | Updated April 11, 2019 Mapping with Vector Tiles Query Features Outside the Viewport The goal of my original post on client-side web mapping for large datasets was ...
Posted August 13, 2016 Jekyll, Leaflet and TurfJS Open Source Tools for Web Mapping This presentation was given at the Northeast Ohio GIS Sympoisum on August 25, 2016. The primary objective was to give an overview of using ...
Posted January 24, 2016 Leaflet & GeoJson Tiles A County Parcel App: No GIS Server? No Problem! Update 2017-08-01 This app has seen two more iterations. These each utilize an mbtiles-server to host the vector tiles, but still use client-si...
Posted December 18, 2015 CartoDB Visualizations One Data Set Four Ways The maps above use the same data set, visualized using four different map types in the CartoDB web interface...
Posted December 3, 2015 A Modern Leaflet Toolbar Horizontal Toolbars in Leaflet This is my take on a more modern looking leaflet toolbar/ui. With leaflet-search as t...
Posted October 12, 2015 | Updated April 9, 2019 Conkle's Hollow Fall Hike Mapping GPS Tracks with Leaflet One of the benefits of using the open source Leaflet mapping library is the wide variety of available community supported plugins. This simple map ...
Posted July 13, 2015 | Updated October 27, 2018 Leaflet Photo Map A Trip Out West circa 1985 Update: This map originally used Google’s Picasa Web API, but this will soon be shut down...
Posted November 19, 2014 Google MyMaps, Leaflet and ArcGIS Online This is a quick look at Leaflet, Google MyMaps and Esri’s ArcGIS Online....
Posted November 19, 2014 Hosting a GeoJson on GitHub GitHub will host and preview your geojson files! Geomusings gives a...
Posted June 12, 2014 | Updated September 12, 2020 Google Drive Fusion Tables Update: Google has deprecated Google Fusion Tables....
Posted June 6, 2014 Raster Catalogs Here I explain how to create a raster catalog in order to have a mosaic of a set of images. This way you can always add or change the images instea...
Posted January 31, 2014 Desktop to the Cloud: GIS Cloud and Rasters One of the clients I work with utilizes unmanaged raster catalogs as part of their work flow. We manage over 20 raster catalogs with close to 4gb o...
Posted January 30, 2014 Animating Urban Growth via the ArcMap Time Slider One Hundred Years of Urban Growth in Ten Seconds This video shows the growth of urban infrastructure from 1850 (blue) through to the present (red). I utilized the time/timeslider/export video feat...
Posted January 26, 2014 Use Only Selected Features in Model Builder This little trick came from GIS stack exchange. To run a model using only selected features, open your model and in the model builder window right ...