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| The timeline (above) displays the area of water hyacinth, in hectares, observed on the surface of Napoleon Gulf, Uganda on a series of dates. The table to the right contains the same data in text format. The values can be copied and pasted into the application of your choice for analysis. | |||||||||||||||||||||||||||||||||||||
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The classified image, to the left, of Napoleon Gulf has been superimposed on a shaded elevation matrix (from GTOPO30). Population points and hydrography (from the Digital Chart of the World) and the main body of Lake Victoria (in dark blue, from the USGS report) were added to provide locational context. This image, and the six below, are linked to high-resolution images that can be panned and zoomed in and out so that you can view details of the water hyacinth's location on particular dates. (Images for the final three data points are not presented since no water hyacinth was detected on those dates.) The legend below applies to area inside Mwanza Gulf for all seven images shown here. | ||||||||||||||||||||||||||||||||||||
| Date: 1995-01-19 Area covered by water hyacinth (WH) in Ha: 829.53 Percent of Napoleon Gulf visible (% visible): 98.38 |
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| Visible water in Napoleon Gulf on date | |||||||||||||||||||||||||||||||||||||
| Visible water hyacinth on date | |||||||||||||||||||||||||||||||||||||
| Obscured on date (clouds, outside image boundary) | |||||||||||||||||||||||||||||||||||||
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| Date: 1996-02-15 Area WH: 530.00 % visible: 98.53 |
Date: 1996-10-31 Area WH: 40.00 % visible: 98.53 |
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| Date: 1997-04-19 Area WH: 807.84 % visible: 100 |
Date: 1998-03-04 Area WH: 1256.5 % visible: 100 |
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| Date: 1998-07-26 Area WH: 710.75 % visible: 100 |
Date: 1999-06-10 Area WH: 6.15 % visible: 95.51 |
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