The file attributes are associated with all products in the HDF file. These attributes contain such information as the creation of the file, the sensor platform for which the data was derived, and geographical coverage. The attributes are divided into several groups and are discussed below.
The processing meta data includes a description of the inputs used to create this Level-3 Regional Data Product file. Not all attributes given here will be present in a given file - several are sensor specific.
The prodList attribute is a list of the geophysical products stored in the file. It excludes the standard data sets like CP_Pixels, etc.
Table 7.1. Input Parameters Attributes
| Name | Description |
|---|---|
| inputCalibrationFile | Name of the calibration file used. SeaWiFS/MOS specific. |
| inputParameters | A string indicating the options used during the processing of the file |
| inputMasksInt | The mask defined as an integer |
| inputMasks | A comma seperated list of flags that were used as masks during processing. |
| prodList | A comma seperated list of products stored in this file. |
| processingVersion | Version of processing |
This meta data contains information about the geographical coverage of the data file and the resulting regional geographical coverage.
Because the Level-3 Regional Data Product files are mapped images, the following information provides the navigation information of the projection used. The projection system used by APS v3.4 is based on the NASA PC-SeaPAK projection system which uses two tie-points and the USGS projection software to perform the navigation.
Table 7.2. Navigation Attributes
| Name | Description |
|---|---|
| navType | Navigation type of data. Always set to 'mapped' |
| mapProjectionSystem | Map projection system used. Always set to NRL(USGS) |
| mapProjection | Name of the SDS included in the file that contains the map projection parameter values. |
| mappedUpperLeft | Latitude and longitude of upper left (1,1) point of each product. |
| mappedUpperRight | Latitude and longitude of upper right (1,n) point of each product. |
| mappedLowerLeft | Latitude and longitude of lower left (m,1) point of each product. |
| mappedLowerRight | Latitude and longitude of lower right (m,n) point of each product. |
This meta data contains information about the geographical coverage of the data file. This data is still in sensor view.
Table 7.3. Input Geographical Coverage Attributes
| Name | Description |
|---|---|
| localeUpperLeft | latitude and longitude of upper left (1,1) point of original input data. |
| localeUpperRight | latitude and longitude of upper right (1,n) point of original input data. |
| localeLowerLeft | latitude and longitude of lower left (m,1) point of original input data. |
| localeLowerRight | latitude and longitude of lower right (m,n) point of original input data. |
| localeNWCorner | latitude and longitude of NorthWestern point of original input data. |
| localeNECorner | latitude and longitude of NorthEastern point of original input data. |
| localeSWCorner | latitude and longitude of SouthWestern point of original input data. |
| localeSECorner | latitude and longitude of SouthEastern point of original input data. |