Adding Esri Map Services with Custom Tiling Schemes to Leaflet.js

I have been developing data visualization web mapping applications for various Cumberland County departments using the Leaflet.js JavaScript library. All of these apps have used the standard WGS84 Web Mercator Auxiliary Sphere projection/tiling scheme. This is used in Google Maps, ArcGIS Online, and the other major web map players. And while this works just fine, …

Embedding a Leaflet.js Map on a Drupal Site

As an active member of the Pennsylvania Mapping & Geographic Information Consortium (PaMAGIC), I am serving as the website admin for the organization.  A few months ago we completed the rebuild of our site using Drupal 7.x.  As our membership is primarily professionals who use maps in their daily work, we wanted to include a …

Automating GIS Workflows with Python Scripts

This week I am presenting a session titled Automating Workflows with Python at the Pennsylvania GIS Conference.  The session walks people through the process of creating a Python script that can be set-up as a Windows Scheduled Task.  This would allow simple tasks like data replication and rebuilding address locators to automatically run on a weekly …

Leaflet GeoJSON Feature Search

Last month I published the PaMAGIC Members Map on the organization's website.  The map was built using the Esri plugins to Leaflet.js.  One of my favorite features of their geocoding plugin is the ability to search within the features of a map/feature service.  The map is using this plugin to allow users to search for …

Script Example: Move and Unzip File; Rename Zipped File

I wanted to share a script I developed as part of a regional GIS group Cumberland County is a member of.  Each member county extracts their data and uploads it to an FTP site.  Then a extract-transform-load process (several scripts) is completed to update the regional datasets.  The simple utility script I'm sharing accomplishes two goals: …

Using GeoJSON with Leaflet

Last November, I presented an introductory session on the GeoJSON data format at the Central PA GIS Day event in Harrisburg, PA.  I also have a GeoJSON/Leaflet pen on CodePen that has been getting decent traffic lately.  With these things in mind, I thought I’d share a some thoughts about GeoJSON. My presentation and demos from …

Leaflet Web Map Helper Functions

I believe it was back at GIS Day 2015 when I decided I was going to give the Leaflet.js web mapping library a shot.  I had some HTML and CSS skills under my belt, and knew a little bit about JavaScript.  I started by creating simple embedded maps.  My first full-page app had a weak …