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| Tip | ||
|---|---|---|
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| The inclusion of a bounding box (GeographicBoundingBox) or a polygon (BoundingPolygon) is a good practice in the GIS world. They are useful for applications that represent the data graphically, to set the initial window size. They are also facilitate the evaluation of the geographical coverage of a data set without having to parse and decode the full data set. |
Geographic Description
Requirement | Reference | DS-META-007 |
Element Name | Geographical extent of the data set | |
Obligation / Condition | Mandatory for obstacle data sets. Optional for other ICAO data sets. If provided:
| |
Multiplicity | 1..* | |
ISO 19115 (2003) | Number | 349 |
Name | geographicIdentifier | |
Definition | identifier used to represent a geographic area | |
XPath | gmd:MD_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:extent/gmd:EX_Extent/gmd:geographicElement/gmd:EX_GeographicDescription/gmd:MD_Identifier/gmd:code/gco:CharacterString | |
Data type | CharacterString | |
Domain | Free Text | |
Example | Belgium and Luxembourg | |
Implementing Instructions | - | |
| Code Block | ||||
|---|---|---|---|---|
| ||||
<gmd:MD_Metadata>
...
<gmd:identificationInfo>
<gmd:MD_DataIdentification>
<gmd:extent>
<gmd:EX_Extent>
<gmd:geographicElement>
<gmd:EX_GeographicDescription>
<gmd:geographicIdentifier>
<gmd:MD_Identifier>
<gmd:code><gco:CharacterString>Belgium and Luxembourg</gco:CharacterString></gmd:code>
</gmd:MD_Identifier>
</gmd:geographicIdentifier>
</gmd:EX_GeographicDescription>
</gmd:geographicElement>
</gmd:EX_Extent>
</gmd:extent>
</gmd:MD_DataIdentification>
</gmd:identificationInfo>
...
</gmd:MD_Metadata> |
Geographic Bounding Box
Requirement | Reference | DS-META-007 |
Element Name | Geographical extent of the data set | |
Obligation / Condition | Mandatory for obstacle data sets. Optional for other ICAO data sets. If provided:
| |
Multiplicity | 1..* | |
ISO 19115 | Number | 344 |
Name | westBoundLongitude | |
Definition | Western-most coordinate of the limit of the dataset extent, expressed in longitude in decimal degrees (positive east) | |
XPath | gmd:MD_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:extent/gmd:EX_Extent/gmd:geographicElement/gmd:EX_GeographicBoundingBox/gmd:westBoundLongitude/gco:Decimal | |
Data type | Decimal | |
Domain | -180.00 <= West Bounding Longitude Value <= 180.00 | |
Example | 3.93 | |
ISO 19115 | Number | 345 |
Name | eastBoundLongitude | |
Definition | Eastern-most coordinate of the limit of the dataset extent, expressed in longitude in decimal degrees (positive east) | |
XPath | gmd:MD_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:extent/gmd:EX_Extent/gmd:geographicElement/gmd:EX_GeographicBoundingBox/gmd:eastBoundLongitude/gco:Decimal | |
Data type | Decimal | |
Domain | -180.00 <= East Bounding Longitude Value <= 180.00 | |
Example | 7.57 | |
ISO 19115 | Number | 346 |
Name | southBoundLatitude | |
Definition | Southern-most coordinate of the limit of the dataset extent, expressed in latitude in decimal degrees (positive north) | |
XPath | gmd:MD_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:extent/gmd:EX_Extent/gmd:geographicElement/gmd:EX_GeographicBoundingBox/gmd:southBoundLatitude/gco:Decimal | |
Data type | Decimal | |
Domain | -90.00 <= South Bounding Latitude Value <= North Bounding Latitude Value | |
Example | 52.10 | |
ISO 19115 | Number | 347 |
Name | northBoundLatitude | |
Definition | Northern-most coordinate of the limit of the dataset extent, expressed in latitude in decimal degrees (positive north) | |
XPath | gmd:MD_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:extent/gmd:EX_Extent/gmd:geographicElement/gmd:EX_GeographicBoundingBox/gmd:northBoundLatitude/gco:Decimal | |
Data type | Decimal | |
Domain | South Bounding Latitude Value <= North Bounding Latitude Value <= 90.00 | |
Example | 54.10 | |
Implementing Instructions | - | |
| Code Block | ||||
|---|---|---|---|---|
| ||||
<gmd:MD_Metadata>
...
<gmd:identificationInfo>
<gmd:MD_DataIdentification>
<gmd:extent>
<gmd:EX_Extent>
<gmd:geographicElement>
<gmd:EX_GeographicBoundingBox>
<gmd:westBoundLongitude><gco:Decimal>3.93</gco:Decimal></gmd:westBoundLongitude>
<gmd:eastBoundLongitude><gco:Decimal>7.57</gco:Decimal></gmd:eastBoundLongitude>
<gmd:southBoundLatitude><gco:Decimal>52.10</gco:Decimal></gmd:southBoundLatitude>
<gmd:northBoundLatitude><gco:Decimal>54.10</gco:Decimal></gmd:northBoundLatitude>
</gmd:EX_GeographicBoundingBox>
</gmd:geographicElement>
</gmd:EX_Extent>
</gmd:extent>
</gmd:MD_DataIdentification>
</gmd:identificationInfo>
...
</gmd:MD_Metadata> |
BoundingPolygon
Requirement | Reference | DS-META-007 |
Element Name | Geographical extent of the data set | |
Obligation / Condition | Mandatory for obstacle data sets. Optional for other ICAO data sets. If provided:
| |
Multiplicity | 1..* | |
ISO 19115 (2003) | Number | 342 |
Name | polygon | |
Definition | set of points defining the bounding polygon | |
XPath | gmd:MetaData/gmd:identificationInfo/gmd:DataIdentification/gmd:extent/gmd:EX_Extent/gmd:geographicElement/gmd:EX_BoundingPolygon/gmd:polygon | |
Data type | Class | |
Domain | GM_Object | |
Example | 30 30 30 40 60 40 60 30 | |
Implementing Instructions | - | |
...