Caitlin Dempsey, Author at GIS Lounge

Google's Earth Engine Data Catalog lets users discover public geospatial datasets.

Find Public GIS Data with Google’s Earth Engine Catalog

October 20, 2020 by Caitlin Dempsey

The Earth Engine Data Catalog lets users search and discover Earth observation public datasets.

Participating in the annual 30 Day Map challenge in November hosted by Topi Tjukanov on Twitter is one way for users to improve their cartography skills.

November 2020 Map Challenge

October 20, 2020October 20, 2020 by Caitlin Dempsey

Topi Tjukanov has announced a 30-day map challenge starting November 1.

An example of the building footprints open data set for Australia. Source: Microsoft.

11,334,866 Building Footprints for Australia

October 20, 2020 by Caitlin Dempsey

Microsoft has released 11,334,866 building footprints covering the country of Australia.

The left image shows the USDA CDL layer for Corn and soybean classification around Webster City, Hamilton County, Iowa in 2001. The right image shows the results of the Corn-Soy Data Layer (CSDL). Figure: Wang et al., 2020.

Mapping Crops: Filling in Data Gaps with Landsat Archives

October 2, 2020 by Caitlin Dempsey

A recent study analyzed twenty years of Landsat data to look at corn and soybean crops across the US Midwest from 1998-2018.

QGIS on a laptop. Image: Caitlin Dempsey

Survey of GIS Professionals

September 26, 2020September 20, 2020 by Caitlin Dempsey

A quick look at GIS professionals, their educational background, and the software tools and programming languages they use in their jobs.

Map A shows OpenStreetMap (OSM) building footprints overplayed onto an aerial. Map B shows predicted building footprint by area. The darker purple areas predict a high frequency of building footprints. The yellow overlay are the OSM building footprint layer. Source: Goldblatt, Jones, & Mannix, 2020, CC BY 4.0

Using Open Source Geospatial Tools to Find Missing Building Footprints

August 28, 2020August 28, 2020 by Caitlin Dempsey

Researchers have developed a methodology that uses remote sensing measurements to predict completeness in coverage of building footprints in OpenStreetMap data.

Researchers have mapped out the ecological quality of tropical forests using satellite data.

Mapping Tropical Forest Quality from Satellite Data

September 29, 2020August 26, 2020 by Caitlin Dempsey

Researchers have created high resolution maps of tropical forest quality using remotely sensed data from NASA satellites.

Esri’s Disaster Response Program Hurricane Hub site

Find Maps and GIS Data from Esri’s Hurricane Hub

August 26, 2020 by Caitlin Dempsey

Esri has set up a Disaster Response Program Hurricane Hub site to consolidate federal sources of GIS data and maps.

Screenshot of the OpenTopography map interface.

Find Open Sources of Elevation Data With OpenTopography

October 9, 2020August 25, 2020 by Caitlin Dempsey

OpenTopography is a portal that provides access to open sources of topographical datasets and processing tools.

Self-Guided QGIS Courses

October 9, 2020August 21, 2020 by Caitlin Dempsey

These six QGIS courses are available for free self-guided learning.

GIS and Map Contests Roundup

September 4, 2020August 17, 2020 by Caitlin Dempsey

Current map and GIS related competitions listed in order of the competition deadline.

Blue are areas of high spatial accuracy while orange areas are less spatially accurate.

Esri Debuts New GIS Tools and Apps at the 2020 Annual User Conference

July 22, 2020 by Caitlin Dempsey

The first two plenary sessions contained a lot of demonstrations by Esri staff featuring the new GIS tools and applications launching this year.

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