The <Spatial_Coverage> field specifies the geographic and vertical (altitude, depth) coverage of the data.
- <Southermost_Latitude>: The southernmost geographic latitude covered by the data. From: 0 - 90° North or 0 - 90° South. For example, <Southernmost_Latitude>90S</ Southernmost_Latitude>.
- Northernmost_Latitude>: The northernmost geographic latitude covered by the data. From: 0 - 90° North or 0 - 90° South. For example, <Northernmost_Latitude>90N</ Northernmost_Latitude>.
- Westernmost_Longitude>: The westernmost geographic longitude covered by the data. From: 0 - 180° east or 0 - 180° west. The Prime Meridian is 0 degrees, measured positive (+) eastwards of the PM. For example, <Westernmost_Longitude>70W</ Westernmost_Longitude>.
- Easternmost_Longitude>: The easternmost geographic longitude covered by the data. From: 0 - 180° east or 0 - 180° west. The Prime Meridian is 0 degrees, measured positive (+) eastwards of the PM. For example, <Easternmost_Longitude>70E</ Easternmost_Longitude>.
- <Minimum_Altitude>: The altitude level, which represents the lower limit of data coverage. Units can be specified. For example, <Minimum_Altitude>10 km </Minimum_Altitude>.
- <Maximum_Altitude>: The altitude level, which represents the higher limit of data coverage. Units can be specified. For example, <Maximum_Altitude>100 km </Maximum_Altitude>.
- <Minimum_Depth>: The depth level, which represents the upper-most depth of data coverage. Units can be specified. For example, <Minimum_Depth>100 m </Minimum_Depth>.
- <Maximum_Depth>: The depth level, which represents the lowest depth of data coverage. Units can be specified.. For example, <Maximum_Depth>1000 m </Maximum_Depth>.
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<Spatial_Coverage>
<Southernmost_Latitude>0 - 90° North or 0 - 90° South</Southernmost_Latitude>
<Northernmost_Latitude>0 - 90° North or 0 - 90° South</Northernmost_Latitude>
<Westernmost_Longitude>0 - 180° east or 0 - 180° west</Westernmost_Longitude>
<Easternmost_Longitude>0 - 180° east or 0 - 180° west</Easternmost_Longitude>
<Minimum_Altitude> Text up to 80 characters</Minimum_Altitude>
<Maximum_Altitude> Text up to 80 characters</Maximum_Altitude>
<Minimum_Depth> Text up to 80 characters</Minimum_Depth>
<Maximum_Depth> Text up to 80 characters</Maximum_Depth>
</Spatial_Coverage>
- Characters may be selected from the printable ASCII character set.
- A minus sign, "-", placed immediately before the latitude value indicates a latitude south of the Equator (defined as 0 degrees latitude). A minus sign, "-", placed immediately before the longitude value indicates a longitude west of the Prime Meridian (defined as 0 degrees). Latitude north of the Equator (positive) and a longitude east of the Prime Meridian (positive) are assumed if minus signs are not entered before the latitude and longitude values.
N, S, E, or W do not have to be specified, but can be used in place of minus signs. N indicates latitude North of the Equator, S indicates latitude South of the Equator, E indicates longitude East of the Prime Meridian, and W indicates longitude West of the Prime Meridian. |
The <Spatial_Coverage> field is optional and may be repeatable.
- Each field within <Spatial_Coverage> is optional and may not be repeated, with the following exception:
- If latitude or longitudes are specified, all four values (<Northern- and <Southernmost_Latitude>, <Western- and <Easternmost_Longitude>) must be specified.
- Point data can be specified by repeating <Northernmost_Latitude> and <Southernmost_Latitude> and <Westernmost_Longitude> and <Easternmost_Longitude> values.
- Note:
- Pay careful attention to coordinates when specifying the bounding box of the data set. Remember that the <Southernmost_Latitude> may be in the Northern Hemisphere. Likewise, <Northernmost_Latitude> may be in the Southern Hemisphere, <Westernmost_Longitude> may be in the Eastern Hemisphere, and <Easternmost_Longitude> may be in the Western Hemisphere.
- If data coverage extends over the North Pole, the <Northernmost_Latitude> is 90N (or +90), the <Southernmost_Latitude> is the southernmost extent of the data, the <Easternmost_Longitude> is 180E (or +180), and the <Westernmost_Longitude> is 180W (or -180).
- If data coverage extends over the South Pole, the <Southernmost_Latitude> is 90S (or -90), the <Northernmost_Latitude> is the northernmost extent of the data, the <Easternmost_Longitude> is 180E (or +180), and the <Westernmost_Longitude> is 180W (or -180).
- If data coverage extends over the International Date Line (180 ° Longitude), the <Easternmost_Longitude> of the data will likely be in the Western Hemisphere, and the <Westernmost_Longitude> will likely be in the Eastern Hemisphere.
- Some examples of altitude and depth units are 'm' (meters), 'km' (kilometers), 'ft' (feet), 'surface', 'hPA' (hecto Pascals), and 'mb' (millibars).
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1. Bounding Box Data Set:
<Spatial_Coverage>
<Southernmost_Latitude>25.0 </Southernmost_Latitude>
<Northernmost_Latitude>50.0 </Northernmost_Latitude>
<Westernmost_Longitude>-100.0 </Westernmost_Longitude>
<Easternmost_Longitude>-50.0 </Easternmost_Longitude>
<Minimum_Altitude>5 miles</Minimum_Altitude>
<Maximum_Altitude>10 miles</Maximum_Altitude>
<Minimum_Depth>10 feet</Minimum_Depth>
<Maximum_Depth>100 feet</Maximum_Depth>
</Spatial_Coverage>
2. Global Data Set:
<Spatial_Coverage>
<Southernmost_Latitude>90S</Southernmost_Latitude>
<Northernmost_Latitude>90N</Northernmost_Latitude>
<Westernmost_Longitude>180W</Westernmost_Longitude>
<Easternmost_Longitude>180E</Easternmost_Longitude>
</Spatial_Coverage>
3. Point Data Set:
<Spatial_Coverage>
<Southernmost_Latitude>-61</Southernmost_Latitude>
<Northernmost_Latitude>-61</Northernmost_Latitude>
<Westernmost_Longitude>-46</Westernmost_Longitude>
<Easternmost_Longitude>-46</Easternmost_Longitude>
</Spatial_Coverage>
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