Civic Apps Archives - Azavea - Beyond Dots on a Map

Parts of map highlighted overlaid on a photograph of a bee.

Using Cloud-Optimized GeoTIFFs (COGs) for More Efficient Web App Architecture

By Jenny Fung on April 23rd, 2019

Cloud-Optimized GeoTIFFs (COGs) are geoTIFFs hosted on a cloud or file server, and are optimized for remote reads. They proved useful in a recent project.

Software Engineering

Introducing the Open Apparel Registry

By Deb Boyer on March 28th, 2019

We are excited to announce the launch of the Open Apparel Registry, an open source global map of garment producing facilities.

Photograph of sunlight coming in through tree's branches.

Software Engineering

Lessons on tree-shaking Lodash with Webpack and Babel

By Casey Cesari on March 7th, 2019

Tree-shaking lodash can reduce the size of your JavaScript bundle, but it requires that a few conditions are met along the way to implementing it.

Software Engineering

Introducing TileJSON.io, A Fast and Easy Way to View and Share Raster Tiles

By Shreshth Khilani on March 4th, 2019

TileJSON.io is an open source project by Azavea. It is an easy way to view and share raster tile sets using slippy map endpoints.

Philadelphia Building Footprint tiles with an aerial basemap

Software Engineering

Creating Leaflet Tiles from Open Data using PostGIS and QGIS

By Kelly Innes on October 11th, 2018

A guide to transforming open geospatial data into slippy map tiles to display in Leaflet or OpenLayers using PostGIS, QGIS, and QTiles.

Software Engineering

Generating Pyramided Tiles from a GeoTIFF using GeoTrellis

By Terence Tuhinanshu on August 6th, 2018

A tutorial for generating pyramided map tiles (also called Slippy Map tiles) from a GeoTIFF using GeoTrellis, which can be used in Leaflet or OpenLayers.