Constructor Detail

• WorldPopExtract()

• WorldPopExtract(groovy.lang.Binding context)

Method Detail

• static java.lang.String buildSubset(java.lang.Object bbox)

  This method is used to build the subset filter used by the WCS request from bbox defined by a set of latitude and longitude coordinates See OGC® Web Coverage Service 2.0 Interface Standard - KVP Protocol Binding Extension The order of values in the bounding box is : south ,west, north, east south : float -> southern latitude of bounding box west : float -> western longitude of bounding box north : float -> northern latitude of bounding box east : float -> eastern longitude of bounding box So : minimum latitude, minimum longitude, maximum latitude, maximum longitude

  Authors:

  Erwan Bocher (CNRS LAB-STICC)

  Parameters:

  bbox - 4 values

  Returns:

  the subset filter

• java.lang.String createGridRequest(java.lang.String coverageId, java.lang.Object bbox)

  A method to create the WCS grid request @return

  Parameters:

  coverageId - coverage identifier on the server

  bbox - an array of coordinates in lat/long

• java.lang.String extractWorldPopLayer(java.lang.String coverageId, java.util.List bbox)

  This process is used to extract a grid population data from https://www.worldpop.org The grid is stored in a tmp dir. If the grid already exists the file is reused.

  Parameters:

  coverageId - coverage identifier on the server

  bbox - an array of coordinates in lat/long

  Returns:

  the path of the extract grid, stored on a temporary directory

• boolean grid(java.lang.String coverageId, java.lang.Object bbox, java.io.File outputGridFile)

  Method to execute a query on the WorldPop Web Coverage Service and return grid coverage in ascii format

  Parameters:

  coverageId - the name of the layer on the WCS service

  bbox - to extract the data

  epsg - output epsg code, default is 4326

  outputGridFile - the output file

  Returns:

  True if the query has been successfully executed, false otherwise.

  Authors:

  Erwan Bocher (CNRS LAB-STICC)

• boolean grid(java.lang.String wcsRequest, java.io.File outputGridFile)

  Method to execute a query on the WorldPop Web Coverage Service and return grid coverage in ascii format

  Parameters:

  wcsRequest - the worldpop WCS request

  outputGridFile - the output file

  Returns:

  True if the query has been successfully executed, false otherwise.

  Authors:

  Erwan Bocher (CNRS LAB-STICC)

• java.lang.String importAscGrid(JdbcDataSource datasource, java.lang.String worldPopFilePath, int epsg, java.lang.String tableName)

  Process to import and asc grid into the database

  Parameters:

  datasource - a connection to the database

  worldPopFilePath - the path of the grid

  epsg - SRID code set to the grid

  tableName - the name of table that contains the grid data in the database

  Returns:

  the name of the imported table

• boolean isCoverageAvailable(java.lang.String coverageId)

  A method to test if the coverageId is available @return

  Parameters:

  coverageId

• static void main(java.lang.String[] args)

• java.lang.Object run()