Category Archives: GIS

History of Aerial Photography

Posted on February 18, 2020 by Rashid Faridi

The first real Aerial photograph was taken around 1826. The first aerial photograph was taken in 1858 by Felix Tournachon, known as Nadar, from a tethered balloon over the Bievre Valley in France. Those photographs no longer exist. The oldest surviving aerial … Continue reading →

Posted in Class Notes, earth, Geography Practicals/Lab and Statistical Techniques, GIS, Remote Sensing 101, urban morphology, Urban Studies | Leave a comment

New U.S. Datum Requires Location Corrections

Posted on October 3, 2017 by Rashid Faridi

A new datum or geospatial reference system is being introduced in the United States to become the official datum in 2022. Pam Fromhertz of the NOAA National Geodetic Survey gave an overview of the reasoning behind the new datum, technical … Continue reading →

Posted in earth, GIS, map making | Leave a comment

Concept and Applications of Digital Elevation Model (DEM)

Posted on April 27, 2017 by Rashid Faridi

A digital elevation model (DEM) is a digital model or 3D representation of a terrain’s surface — commonly for a planet (including Earth), moon, or asteroid — created from terrain elevation data. In most cases the term digital surface model represents the earth’s surface and includes … Continue reading →

Posted in Class Notes, earth, GIS, Remote Sensing 101 | 1 Comment

Synthetic Aperture Radar Using ‘Inflation’ Monitoring could Predict Volcanic Eruptions

Posted on November 10, 2012 by Rashid Faridi

The world’s deadliest and largest volcanic eruptions happen in Indonesia. Future eruptions in this jungle-filled region could be better predicted by using satellite radar to detect swelling magma near the summit of those volcanoes, a new study suggests. To search … Continue reading →