Remote Sensing Archives - GIS Geography

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Selective Availability in Global Positioning System (GPS)

Selective availability is the intentional degradation of GPS signals. When selective availability was enabled, this added error horizontally and vertically to GPS signals.

sentinel satellites copernicus programme

Sentinel Satellites of the Copernicus Programme

Copernicus is the world’s largest and most ambitious Earth observation program in existence today with its Sentinel satellites taking center stage.

Remote Sensing of the Environment: Local and Global Environmental Issues

As our population grows, this poses new challenges to monitoring the environment and climate change. Remote sensing of the environment helps solve environmental issues for the land, ocean, atmosphere and climate change.

DigitalGlobe Satellite Imagery: Worldview, GeoEye and IKONOS

If you want the sharpest satellite imagery in the world, then you should harness the power of DigitalGlobe satellite imagery. Each pixel in a Worldview-3 image is about the size of home plate on a baseball diamond. That’s about 31 cm.

The Big Satellite List. 50 Satellites. 30 Words or Less.

Think you know remote sensing satellites? Think again. This satellite list has the top 50 satellites that silently orbit the Earth. In 30 words or less.

IKONOS Satellite Imagery: First Commercial Space-based Imaging

IKONOS provides panchromatic, natural-color, color-infrared and stereo images for cartographic, remote sensing and photogrammetric applications.

SRTM Shuttle Radar Topography Mission

During an 11-day mission, Space Shuttle Radar Topography (SRTM) mission captured Earth’s elevation at 1 arc-second (30 meters) for over 80% of the Earth.

Learn Synthetic Aperture Radar (SAR) by Example

Synthetic Aperture Radar (SAR) is an emerging technology in remote sensing with the advantage to see in any weather condition and even at night.

Polar Orbit vs Sun Synchronous Orbit

A polar orbit satellite travels pole-to-pole. For a sun-synchronous orbit, it passes over any given point on Earth’s surface at the same local solar time.

OBIA – Object-Based Image Analysis (GEOBIA) – Think Objects, Not Pixels

Object-based Image Analysis (OBIA) segments an image by grouping pixels together into vector objects. Using these objects, you classify as land cover types.

Software

The Hidden Powers of QGIS 3: 33 Truly Underappreciated Features and Plugins

When QGIS releases a new version, it’s kinda a big deal. Because the unsung heroes of open source GIS software are back! It’s their third big release. QGIS 3!
Remote Sensing

The Big Satellite List. 50 Satellites. 30 Words or Less.

Think you know remote sensing satellites? Think again. This satellite list has the top 50 satellites that silently orbit the Earth. In 30 words or less.
GIS Career

1000 GIS Applications & Uses – How GIS Is Changing the World

From over 50 industries, here are 1000 GIS applications to open your mind of our amazing planet, its interconnectivity with location intelligence in mind.

Software

27 Differences Between ArcGIS and QGIS – The Most Epic GIS Software Battle in GIS History

It’s a head-to-head GIS software showdown with the star-studded lineup in the GIS industry- ArcGIS vs QGIS. Discover the differences between ArcGIS and QGIS
Maps & Cartography

Magnetic North vs Geographic (True) North Pole

The Magnetic North Pole is a point in Northern Canada where the northern lines of attraction enter the Earth. Compass needles point to the magnetic north.
Software

13 Free GIS Software Options: Map the World in Open Source

There’s a bucket load of free GIS software packages available for you to map the world. Manage, visualize and edit GIS data with open source GIS software.

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