Map Your Luck

Just for fun, I thought it might be interesting to bring some of the ideas of the old game show “Press your Luck” into an interactive web map.

Filter Tiled Layers

One of the core ideas in mapping is the difference between vector and raster layers. For vector layers, the actual geometry data is stored and passed around - for example a point might store the latitude and longitude. For tiled raster layers, the data is stored as images on the server, and those images are displayed as the layer.

In the past, the visualization of tiled raster layers could not be filtered based on geometry. Using layer blending in recent versions of the ArcGIS Maps SDK for JavaScript, this is now possible.

Using the WGS 84 Coordinate System in ArcGIS JavaScript Maps

Web Mercator is the standard for online interactive maps. But what if we want to use the EPSG 4326 (WGS 84) spatial reference?

View all blog posts

Open Data and Maps

Thumbnail image for World Countries Centroids

World Countries Centroids

Thumbnail image for St. Louis Lambert International Airport Data

St. Louis Lambert International Airport Data

Thumbnail image for MLB Spring Training Stadiums

MLB Spring Training Stadiums

Thumbnail image for City Flags

City Flags

Thumbnail image for St. Louis Parks

St. Louis Parks

Thumbnail image for NAVA Annual Meetings

NAVA Annual Meetings

View more: Open Data - Maps


Picture of Gavin RehkemperHi! I'm a technology enthusiast in St. Louis, MO. I work for Esri as a software engineer. I have experience in a range of technologies including JavaScript, PHP, Python. In my free time, I develop web apps, maintain open data, and create maps and visualizations. Read more

To get updates from the site, please sign up for the newsletter: