GIS and Geospatial Technologies

Articles focusing on the application of geographic information systems (GIS), geospatial technologies, remote sensing, LiDAR, and Global Positioning System (GPS). These technologies serve as critical tools for understanding and interacting with our physical environment. GIS allows for the mapping and analysis of spatial data Geospatial technologies refer to the various tools used to measure and analyze Earth’s lands and resources. Remote sensing provides a way to collect data from a distance, often via satellites or high-flying aircraft, and is commonly used for environmental monitoring and military applications.

GIS subcategories :

GIS Career | GIS Data | GIS Industry | GIS Learning | GIS Software | GPS | Remote Sensing | Spatial Analysis

Ryan Resella | Profiles from the Geospatial Community

Caitlin Dempsey

In this GIS interview, Ryan Resella discusses his experience as an inaugural fellow with Code for America last year and his outlook on geospatial technologies.

Moving Beyond Waiting for GIS’ Sally Field Moment

Caitlin Dempsey

To say the least, I was mildly boggled when I noticed that Slashgeo.org was running a poll on “Is Geospatial ...

OpenStreetMap on MapBox Streets.

OpenStreetMap: Grassroots Mapping

Caitlin Dempsey

OpenStreetMap was founded with the goal of creating and providing free geographic data to whoever wants it.

An illustrative example of distance decay using blue points and yellow arrows.

Distance Decay and Its Use in GIS

Caitlin Dempsey

Distance decay is a phenomenon observed between locations or ethnic groups- the further apart they are, the less likely it is that they will interact very much. Distance decay theory in GIS can be used for other purposes such as the effects of time and distance on public transportation ridership, crime analysis, and health care.

Getting Started With QGIS: Open Source GIS

Caitlin Dempsey

Quantum GIS is an open source GIS desktop software more popularly known as QGIS.  QGIS 1.0 was first released in ...

TileMill Now for Windows.

TileMill: Open Source Mapping Now for Windows

Caitlin Dempsey

TileMill can now be used natively in Windows with the latest release.  The release of TileMill 0.9.0 also includes a new plugin system: “TileMill ...

Map of Obesity Rates as Compared to Farmers' Market Locations

Analysis Finds Three Times More Farmers’ Markets in Areas with the Lowest Obesity Rates

Geo Contributor

An independent analysis conducted by mapping analytics firm PetersonGIS shows that locations with the highest obesity rates contain the fewest farmers’ markets.

WorldMap: An Open Source Software Platform

Caitlin Dempsey

Harvard’s Center for Geographic Analysis recently released WorldMap, an open source mapping application designed to make it easier for researchers to upload ...

Map of 2011 Wind Performance for the United States from 3TIER.

Wind and GIS

Caitlin Dempsey

GIS  has many applications in wind mapping, analysis and modeling. Geographic data and modeling of wind performance can help site ...

GIS Industry Trends and Outlook

Caitlin Dempsey

GIS industry trends gain be gleaned by surveys and other reports produced by market research companies.  While most of these ...

Aboveground Woody Biomass Map by Josef Kellndorfer and Wayne Walker.

National Forest Map and GIS Data

Caitlin Dempsey

Josef Kellndorfer and Wayne Walker of the Woods Hole Research Center (WHRC) worked with the USGS and the US Forest Service over a six year period to create this forest map of the United States.

With the new CryoSatApp, elevation profiles are at your fingertips. Users can select the day and orbit from which they want to extract the data, and view Earth’s ice profile from that orbit. Credits: ACS/ESA

Ice Mapping App for Smartphones

Caitlin Dempsey

The European Space Agency has released a new iOS app for accessing ice data from the ESA's CryoSat mission.  

Mapping Air Pollution

Caitlin Dempsey

Pulling real time data from the city government of Madrid, Into the Air is a project led by Nerea Calvillo (along with ...

Open MapQuest

Caitlin Dempsey

Google’s recent enforcement of Google Maps API usage, resulting in charges for those exceeding the stated free usage quotas, has ...

Historical Geography and GIS

Caitlin Dempsey

Historical GIS is the use of GIS data to document the given geography of an area in history.  GIS can ...

Metadata

Caitlin Dempsey

What is metadata and why is it important to document GIS data? Metadata is an important, but unfortunately oft overlooked component of GIS data. Metadata is 'data about the data' and it's vital to understanding to source, currency, scale, and appropriateness of using GIS data.

Basemaps Defined

Caitlin Dempsey

What is a basemap?  The term basemap is see often in GIS and refers to a collection of GIS data ...

QGIS on a laptop. Image: Caitlin Dempsey

GIS on the Mac

Caitlin Dempsey

One of the most popular options for running GIS software directly within the Macintosh OS environment is QGIS.

Best of GIS: Notable 2011 Geospatial Happenings

Caitlin Dempsey

It’s been a very long time since I’ve done a “best of GIS” year end review.   Listed below are ...

Sample Esri Technical Exam Questions

Caitlin Dempsey

Esri is now offering sample questions for Esri’s ArcGIS Desktop Exams.  The sample questions are accessible from Esri’s Training page. ...

Unique Geography Themed Gifts

Caitlin Dempsey

If you're looking for Geography themed presents that go beyond atlases, books, and GPS related products, there are some fun and creative options out there.

A map of the world in the Robinson map projection.

A Look at Some Map Projections

Rachel Quist

The Robinson, Transverse Mercator, Lambert Conformal Conic, and Space Oblique Mercator projections are discussed in this article.

GMTED2010 - Global elevation data.

New Global Elevation Data Available: Global Multi-resolution Terrain Elevation Data 2010

Caitlin Dempsey

NGA and USGS revised and improved their global elevation model.

Validation Report loaded into local GIS. All non-conforming features in the data are identified with coloured arrows to pinpoint where the error is located. The rule that the feature has broken is also displayed next to the arrow.

Explaining Socium, a Cloud Based GIS Data Validation Service

Geo Contributor

Abbie Beckford, Customer Relations and Marketing Manager at Socium, shares insight about the new launch and what the benefits of ...

An orange traffic sign that says" TRUCKERS; Your GPS is LYING. Big Rigs WILL NOT make it up this road.

Online Mapping Sites

Caitlin Dempsey

Web mapping is now vital to most people, providing virtual geography and driving directions on a daily basis.

Nokia’s Crowdsourcing GIS Effort

Caitlin Dempsey

Nokia recently launched Map Creator (in beta), tossing its hat into the crowdsourcing GIS ring.  While the announcement proclaims, “We’ve ...