Content tagged "remote sensing"

Map@Syst has a new website!

Geospatial Technology Updated: February 17, 2017

The (False) Color World: There's more to the world than meets the eye...

Geospatial Technology Updated: June 01, 2016

The goal of this lab is to learn about true and false color images.  Using ArcMap, you will hone your skills at image interpretation and gain a better...

Collecting a Spectral Reflectance Curve: An Exploration of the Electromagnetic Spectrum beyond Human Visibility

Geospatial Technology Updated: June 01, 2016

 Summary of skills covered:Hardware: Spectrometer - a spectrometer kit is available from VirginiaView / the Virginia Geospatial Extension Program.  Contact...

Using Geospatial Tools to Assess Urban Tree Canopy

 Urban forests can be defined as the sum of all woody and associated vegetation in and around dense human settlements (Miller 1997). The people living in and...

LIDAR Derived Products

Geospatial Technology Updated: October 27, 2015

What Products Can be Generated from LIDAR?LIDAR provides a cost-effective means to collect digital information about the Earth's surface. Using LIDAR, we can...

Remote Sensing Resampling Methods

Geospatial Technology Updated: December 08, 2014

When an image is created through remotely sensed data, it needs to undergo some form of validation procedure using observational and/or sampling techniques....

What does vegetation index mean in remote sensing technology?

Geospatial Technology Updated: October 03, 2014

A vegetation index (also called a vegetative index) is a single number that quantifies vegetation biomass and/or plant vigor for each pixel in a remote...

What's the difference between a supervised and unsupervised image classification?

Geospatial Technology Updated: October 17, 2013

Two major categories of image classification techniques include unsupervised (calculated by software) and supervised (human-guided)...

What is a spectral signature in remote sensing?

Geospatial Technology Updated: October 14, 2013

Features on the Earth reflect, absorb, transmit, and emit electromagnetic energy from the sun. Special digital sensors have been developed to measure all...

Agricultural Remote Sensing Basics

Geospatial Technology Updated: December 01, 2011

John NowatzkiGeospatial Technology Specialist NDSU Extension ServiceRobert AndresProfessor UND Department of Space StudiesKarry KylloGraduate Student UND...

ASTER: Satellite Sensor

Geospatial Technology Updated: September 28, 2011

DescriptionA NASA EOS (Earth Observing System) satellite called Terra (EOS AM-1) carries the ASTER instrument. Terra launched on Dec. 18, 1999, and began...

MODIS: Satellite Sensor

Geospatial Technology Updated: September 27, 2011

Description The MODIS (Moderate-Resolution Imaging Spectroradiometer) instruments are part of the NASA EOS (Earth Observing System). Two sun-synchronous,...

RS Publications

Geospatial Technology Updated: September 27, 2011

The following publications have content and articles specific to Remote Sensing. 

Where can I find free aerial imagery?

What is the difference between land use and land cover?

How can I obtain an aerial or satellite image for my area?

What is LIDAR?

Geospatial Technology Updated: July 11, 2008

What is an orthophoto?

Geospatial Technology Updated: July 11, 2008

What is the difference between multispectral and hyperspectral imagery?

Geospatial Technology Updated: January 25, 2008

What is the difference between leaf-on and leaf-off imagery?

Geospatial Technology Updated: January 25, 2008

What is remote sensing, and how can it be used?

Geospatial Technology Updated: January 25, 2008

How can I obtain an aerial or satellite image for my area?

Geospatial Technology Updated: January 25, 2008

Which factors should be considered when choosing remote sensing products?

Geospatial Technology Updated: January 22, 2008

LANDSAT: Satellite Sensor

Geospatial Technology Updated: January 17, 2008

Description NASA developed and launched the Landsat satellites, and the USGS handles the flight operations, maintenance, and management of all ground data...

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This work is supported by the USDA National Institute of Food and Agriculture, New Technologies for Ag Extension project.