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31 Aug 2017 description

This map illustrates satellite-detected surface water extent in Elegu town and surroundings using a Sentinel-1 satellite image acquired on the 23 August 2017. Within the map extent, surface waters extended of about 12% more particularly south and north-west of Elegu where evidences of floods could be observed. It is likely that flood waters have been systematically underestimated along highly vegetated areas along main river banks, and within built-up urban areas because of the characteristics of the satellite data used.

25 Jul 2014 description
report UNOSAT

25 July 2014, Nairobi, Kenya. 14 technical experts working at the IGAD Secretariat and its specialized programmes including the Climate Prediction and Applications Centre (ICPAC), the Centre for Pastoral Areas and Livestock Development (ICPALD) and IGAD-Somalia, completes successfully a one week specialised refresher training on Geographic Information Systems (GIS) and remote sensing applications delivered by UNOSAT trainers.

02 Aug 2013 description
map UNOSAT

This map illustrates the area of Rwamwanja in the Kamwenge District of southwestern Uganda. Rwamwanja is home to both Ugandans and refugees from the neighboring Democratic Republic of the Congo. At UNOSATs request a commercial high resolution satellite image of the region was collected on 22 May 2013 and UNOSAT identified primary and secondary roads as well as 25,980 structures comprising homes, outbuildings, and larger buildings.

11 Mar 2010 description

This map illustrates an updated satellite-based analysis of probable landside-affected areas as identified in post-disaster SPOT-5 imagery recorded 10 March 2010 and pre-disaster Spot-5 imagery from 20 February 2007. Main buildings likely affected by landslides were identified through automatic detection techniques from the pre-crisis SPOT-5 imagery. Please note there is an associated degree of uncertainly for some areas of landslides because of local cloud cover and the building count is likely to be an underestimate from the total number of affected buildings in this area.

09 Mar 2010 description

This map illustrates satellite-detected areas of probable landsides as identified in Formosat-2 imagery recorded on 7 March 2010, and pre-crisis Spot-5 imagery acquired 20 February 2007. Main buildings likely affected by landslides were identified through automatic detection techniques from the pre-crisis SPOT-5 imagery. Please note there is an associated degree of uncertainly for some areas of landslides because of local cloud cover and the building count is likely to be an underestimate from the total number of affected buildings in this area.

10 Oct 2007 description
map UNOSAT

This map illustrates the area surrounding the Aswa bridge, submerged under the elevated flood waters of the Achwa River. The bridge is a critical junction connecting the cities of Gulu and Kitgum. The photographs were recorded by UNHCR staff on 4 October 2007. The background satellite image was recorded in September 2000.

08 Oct 2007 description

This map illustrates the total August rainfall accumulation for East Africa, derived from the CMORPH precipitation dataset at a spatial resolution of approximately 10km for this region, and was calculated using microwave and infrared data from geostationary satellites. It is possible that precipitation levels may have been underestimated for local areas, and is not a substitute for ground station measurements.

19 Sep 2007 description

This map illustrates satellite detected flood water over the flood affected area in eastern Uganda. The flood-analysis outlines (areas in red) include normally occurring water bodies and drainage networks. Some of these areas may not accurately reflect the recently inundated areas. Flood data prepared by ITHACA in cooperation with WFP and UNOSAT.

18 Sep 2007 description

This map illustrates the total August rainfall accumulation for East Africa, derived from the CMORPH precipitation dataset at a spatial resolution of approximately 10km for this region, and was calculated using microwave and infrared data from geostationary satellites. It is possible that precipitation levels may have been underestimated for local areas, and is not a substitute for ground station measurements.

16 Sep 2007 description
map UNOSAT

This map illustrates satellite detected flood water over the flood affected area in eastern Uganda (depicted in red). Flood water analysis was made using MODIS TERRA data recorded 16 September 2007. Additional pre-flood MODIS TERRA data from 21 July 2007 (depicted in blue) was used in this analysis. This flood detection is a preliminary analysis & has not yet been validated in the field.

07 Sep 2007 description
map UNOSAT

This map illustrates satellite detected flood water over the flood affected area in eastern Uganda (depicted in red). Flood water analysis was made using MODIS TERRA data recorded 2 September 2007. Additional pre-flood MODIS TERRA data from 21 July 2007 (depicted in blue) was used in this analysis. This flood detection is a preliminary analysis & has not yet been validated in the field.

31 Aug 2007 description
map UNOSAT

This map illustrates satellite detected flood water over the flood affected area in eastern Uganda (depicted in red). Flood water analysis was made using MODIS TERRA data recorded 24 August 2007. Additional pre-flood MODIS TERRA data from 21 July 2007 (depicted in blue) was used in this analysis. This flood detection is a preliminary analysis & has not yet been validated in the field.

05 May 2006 description
map UNOSAT

Changes in vegetation cover and strength as measured between two 16 day periods (7-21 April 2005 and 7-22 April 2006 (MODIS Enhanced Vegetation Index (EVI))

05 May 2006 description
map UNOSAT

Changes in vegetation cover and strength as measured between two 16 day periods (6-21 March 2006 and 7-22 April 2006 (MODIS Enhanced Vegetation Index (EVI))