ForWarn II

Satellite-Based Change Recognition and Tracking


Mapping the urban phenological footprint

Wed, 03/18/2015 - 21:44 -- stevenorman
The start of greenup for a mixed urban-agricultural Minnesota landscape

Urban areas are renowned for their admixture of species and vegetation types that can change from one parcel to the next. Yards and woodland parks intermix with road medians--all of which may be dominated by an irregular mix of native and exotic trees, shrubs, herbs and grasses. In cities, the vegetation of nearly every block is compositionally complex.

Development cuts forests near Raleigh

Fri, 02/03/2012 - 14:18 -- cadoughe
Deforestation for urban development near Raleigh, NC

Substantial forest area has fallen to development in the periphery of many urban areas over the last decade. The image below shows deforestation in the periphery of Raleigh, NC as yellow to red anomalies. Blue areas have not changed during the last decade. This reveals that many forested inliers have been converted south and east of downtown, but that large areas have been converted west of the city along the outer highway belt. The large block of unroaded blue northwest of downtown is a state park.

Forest loss marks strip mines

Fri, 02/03/2012 - 14:14 -- cadoughe
Deforestation near a strip mine in western Virginia. Image: Steve Norman, USFS.

Deforestation for strip mining is common practice in the coal regions of eastern Kentucky, Virginia and West Virginia. The image below shows areas where forests have been removed for mining over the last decade (left). Using a one-year baseline, it is possible to map areas that are both more and less vegetated on a shorter time scale. This maps where mining activity has been active, where succession or reclamation is taking place. The long term baseline reveals the cumulative effects of this disturbance over the decade.

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