Testing Nominatim Geocoder with Leaflet.js

I recently wrote a post about the Esri Geocoding plugin for the Leaflet.js web mapping library.  In my spare time, I have been working on developing a version of an existing web map that does not use any  Esri-Leaflet plugins.  One of these features of the map is geocoding or searching by street address or …

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Customizing the Esri Shortlist Story Map App

The Esri Story Maps platform is pretty popular among GIS professionals these days.  I wanted to share one of the enhancements I made to the Shortlist template.  I have a fork of this project on GitHub, where I've provided the custom code for both the 1.4.9 and 2.2.3 versions of the app. At version 2.x, …

Esri Leaflet Geocoder Crash Course

I thought I’d introduce the Esri Leaflet Geocoder plugin in this post. It is one of many plugins Esri has developed to support integration with the Leaflet.js web mapping library. Although Esri states that they “provide no guarantee of individual features, nor a traditional product lifecycle to support planning,” they have integrated their technology with …

CSS Hacks for Esri’s Web AppBuilder

Note: This article was first published on 9/11/2017. It has been updated to reflect changes working with Web AppBuilder version 2.8. I've recently had the opportunity to develop a few web map apps using Esri's Web AppBuilder (Developer Edition) platform.  It's essentially a HTML5/JavaScript container that displays a web map and various widgets in a …

Converting Parcels to Address Points With a Python Script

I feel that I have grown in leaps and bounds this year with my Python and ArcPy coding skills.  A big part of this has been the various projects I've taken on helping the Pennsylvania South Central Task Force's (SCTF) GIS Workgroup with its regional data sharing.  I've also been learning a lot about ArcPy …

Setting Up Vector Control for Field Collection & Public Facing Maps

I wanted to take a break from writing about Python scripts and Leaflet.js maps to share a project from a few years ago.  But don't worry, I've shared a few JavaScript snippets at the end.  As a county government GIS agency, we support various departments in our organization.  Our Vector Control department was interested in …

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 …