4th Aug 2015

Detecting artificial water points using freely available satellite data and open source software

By: Harry Jon Foord Owen, Clare Duncan and Nathalie Pettorelli Abstract Deserts are among the most poorly understood biomes in the world, currently experiencing among the highest rates of environmental change and biodiversity loss. A major controlling factor on the ecology and distribution of vegetation and animal populations in these harsh arid systems is the […]
22nd Jun 2015

Application of hyperspectral remote sensing for flower mapping in African savannas

Source: Science Direct – Elsevier Abstract We tested the suitability and accuracy of hyperspectral data to produce the first African flowering and short-term floral cycle map. The spatial distribution and abundance, as well as the floral cycle, of melliferous plants are of utmost importance for evaluating pollination effects and to understand the relationship between melliferous […]
28th Aug 2014

SUPER-RESOLUTION POST-PROCESSING FOR SATELLITES WITH YAW-STEERING CAPABILITY

Abstract We describe a method for improving Earth observation satellite image resolution, for specific areas of interest where the sensor design resolution is insufficient. Our method may be used for satellites with yaw-steering capability, such as NigeriaSat-2. We show that, according to the slanted edge modulation transfer function (MTF) plots, the effective resolution obtained by simulated yaw-steering of […]
28th Aug 2014

Mapping Swelling Soils

Introduction Jones and Holtz (1973) estimated that shrinking and swelling soils cause about $2.3 billion of damage annually in the U.S. alone. Expansive soils have been described as the most widespread of problems in South Africa. Read more…
28th Aug 2014

OPTIMIZATION OF FOREST REHABILITATION PLANNING

Abstract The study mainly investigates the ability to provide a guideline on the exact areas available for rehabilitation and determine the most desirable species that are suitable in order to achieve a desirable success rate. Specifically, this research intends to: Provide a land use map which can further be used to estimate the target forest […]
28th Aug 2014

Monitoring Displaced Population

Application field Humanitarian relief support, mission planning, conflict prevention, crisis monitoring. From a humanitarian point of view, there is no doubt that the most critical parameter to be mapped and monitored is the number of people affected by a crisis or disaster. This applies to all phases of the disaster cycle, ranging from the alerting and emergency response phases […]
28th Aug 2014

INTEGRATIVE USE OF SAR AND OPTICAL DATA FOR FOREST MAPPING IN THE CONGO BASIN

Abstract This study presents an innovative processing chain and various test results for using both SAR (PALSAR) and optical (such as AVNIR, LANDSAT) data in an integrative way for forest mapping in the Congo Basin. Three activities are described in this context: (i) geometric adjustment of SAR and optical data by automatic image matching; (ii) analysis of various […]
28th Aug 2014

Geoinformation in gully erosion studies in the Taita Hills, SE-Kenya, preliminary results

Introduction Gullies are “relatively permanent steep-sided water courses which experience ephemeral flows during rainstorms.” They propagate upward and have distinctive propagating head. They tend to cause severe damage to e.g. agricultural land, reservoirs, and roads. Read more…
28th Aug 2014

Forestry in Nigeria: A brief historical overview, phases of development and present challenges

Abstract Nigeria is blessed with a large expanse of forest cover but this important resource is not sustainably used, managed and/or conserved. Historically, forestry development in Nigeria began with reservation of forest lands in order to manage, maintain forest reserves and provide a supply of timber. This was followed by exploitation of forest resources to meet both export and […]
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