utilities

These are tools or functions used to support the main computation.

__init__.py

value_lookup.py

value_lookup - helpful dictionaries for calculating the bushfire attack level (BAL)

These dictionaries are helpful to adapt the algorithm spatially to Method 1 in AS 3959 (2009).

moduleauthor:Tina Yang <tina.yang@ga.gov.au>

bal_database.py

bal_database - relevant dictionaries for calculating the bushfire attack level (BAL)

These dictionaries are translated from tables from 2.4.2 to 2.4.5 in AS 3959 (2009) to determine the BAL for an area of interest within Australia.

moduleauthor:Tina Yang <tina.yang@ga.gov.au>

sa_tools.py

sa_tools - some support functions replacing spatial analyst

This module includes algorithms that are used to replace spatial analyst functions such as ExtractByMask, Reclassify, Slope and Aspect used within this package.

moduleauthor:Tina Yang <tina.yang@ga.gov.au>
sa_tools.cal_slope_aspect(dem, slope_fname, aspect_fname)[source]

Calculate the slope from the input dem

Parameters:
  • dem – file the input dem
  • slope_fname – file the output slope
  • aspect_fname – file the output aspect
sa_tools.clip_array(data, x_left, y_upper, pixelwidth, pixelheight, extent)[source]

Return the clipped area of the input array according to an sub-extent

Parameters:
  • data – numpy.ndarray the input array
  • x_left – float the left-most x projected coordinate
  • y_upper – float the upper-most y projected coordinate
  • pixelwidth – float the pixel width
  • pixelheight – float the pixel height
  • extent – tuple the clipping extent
Returns:

numpy.ndarray the clipped array
sa_tools.extract_by_mask(image_fname, extent_file, out_fname)[source]

Extract a raster using a feature (shape) file

Parameters:
  • image_fname – file the input raster
  • extent_file – file the input extent feature file
Returns:

file the output raster
sa_tools.reclassify(image_fname, remap, out_fname)[source]

Reclassify the raster as per the input remap

Parameters:
  • image_fname – file the input raster
  • remap – str the info of remap
Returns:

file the output raster