def compute_supply(
base,
recreation_spectrum,
highest_spectrum,
base_reclassification_rules,
reclassified_base,
reclassified_base_title,
flow,
flow_map_name,
aggregation,
ns_resolution,
ew_resolution,
print_only=False,
flow_column_name=None,
vector=None,
supply_filename=None,
use_filename=None,
):
"""
Algorithmic description of the "Contribution of Ecosysten Types"
# FIXME
'''
1 B ← {0, .., m-1} : Set of aggregational boundaries
2 T ← {0, .., n-1} : Set of land cover types
3 WE ← 0 : Set of weighted extents
4 R ← 0 : Set of fractions
5 F ← 0
6 MASK ← HQR : High Quality Recreation
7 foreach {b} ⊆ B do : for each aggregational boundary 'b'
8 RB ← 0
9 foreach {t} ⊆ T do : for each Land Type
10 WEt ← Et * Wt : Weighted Extent = Extent(t) * Weight(t)
11 WE ← WE⋃{WEt} : Add to set of Weighted Extents
12 S ← ∑t∈WEt
13 foreach t ← T do
14 Rt ← WEt / ∑WE
15 R ← R⋃{Rt}
16 RB ← RB⋃{R}
'''
# FIXME
Parameters
----------
recreation_spectrum:
Map scoring access to and quality of recreation
highest_spectrum :
Expected is a map of areas with highest recreational value (category 9
as per the report ... )
base :
Base land types map for final zonal statistics. Specifically to
ESTIMAP's recrceation mapping algorithm
base_reclassification_rules :
Reclassification rules for the input base map
reclassified_base :
Name for the reclassified base cover map
reclassified_base_title :
Title for the reclassified base map
ecosystem_types :
flow :
Map of visits, derived from the mobility function, depicting the
number of people living inside zones 0, 1, 2, 3. Used as a cover map
for zonal statistics.
flow_map_name :
A name for the 'flow' map. This is required when the 'flow' input
option is not defined by the user, yet some of the requested outputs
required first the production of the 'flow' map. An example is the
request for a supply table without requesting the 'flow' map itself.
aggregation :
ns_resolution :
ew_resolution :
statistics_filename :
supply_filename :
Name for CSV output file of the supply table
use_filename :
Name for CSV output file of the use table
flow_column_name :
Name for column to populate with 'flow' values
vector :
If 'vector' is given, a vector map of the 'flow' along with appropriate
attributes will be produced.
? :
Land cover class percentages in ROS9 (this is: relative percentage)
output :
Supply table (distribution of flow for each land cover class)
Returns
-------
This function produces a map to base the production of a supply table in
form of CSV.
Examples
--------
"""
# Inputs
flow_in_base = flow + "_" + base
base_scores = base + ".scores"
# Define lists and dictionaries to hold intermediate data
statistics_dictionary = {}
weighted_extents = {}
flows = []
# MASK areas of high quality recreation
r.mask(raster=highest_spectrum, overwrite=True, quiet=True)
# Reclassify land cover map to MAES ecosystem types
r.reclass(
input=base,
rules=base_reclassification_rules,
output=reclassified_base,
quiet=True,
)
# add to "remove_at_exit" after the reclassified maps!
# Discard areas out of MASK
copy_equation = EQUATION.format(result=reclassified_base,
expression=reclassified_base)
r.mapcalc(copy_equation, overwrite=True)
# Count flow within each land cover category
r.stats_zonal(
base=base,
flags="r",
cover=flow_map_name,
method="sum",
output=flow_in_base,
overwrite=True,
quiet=True,
)
# Set colors for "flow" map
r.colors(map=flow_in_base, color=MOBILITY_COLORS, quiet=True)
# Parse aggregation raster categories and labels
categories = grass.parse_command("r.category",
map=aggregation,
delimiter="\t")
for category in categories:
# Intermediate names
cells = highest_spectrum + ".cells" + "." + category
remove_map_at_exit(cells)
extent = highest_spectrum + ".extent" + "." + category
remove_map_at_exit(extent)
weighted = highest_spectrum + ".weighted" + "." + category
remove_map_at_exit(weighted)
fractions = base + ".fractions" + "." + category
remove_map_at_exit(fractions)
flow_category = "_flow_" + category
flow = base + flow_category
remove_map_at_exit(flow)
flow_in_reclassified_base = reclassified_base + "_flow"
flow_in_category = reclassified_base + flow_category
flows.append(flow_in_category) # add to list for patching
remove_map_at_exit(flow_in_category)
# Output names
msg = "Processing aggregation raster category: {r}"
msg = msg.format(r=category)
grass.debug(_(msg))
# g.message(_(msg))
# First, set region to extent of the aggregation map
# and resolution to the one of the population map
# Note the `-a` flag to g.region: ?
# To safely modify the region: grass.use_temp_region() # FIXME
g.region(
raster=aggregation,
nsres=ns_resolution,
ewres=ew_resolution,
flags="a",
quiet=True,
)
msg = "|! Computational resolution matched to {raster}"
msg = msg.format(raster=aggregation)
grass.debug(_(msg))
# Build MASK for current category & high quality recreation areas
msg = "Setting category '{c}' of '{a}' as a MASK"
grass.verbose(_(msg.format(c=category, a=aggregation)))
masking = "if( {spectrum} == {highest_quality_category} && "
masking += "{aggregation} == {category}, "
masking += "1, null() )"
masking = masking.format(
spectrum=recreation_spectrum,
highest_quality_category=HIGHEST_RECREATION_CATEGORY,
aggregation=aggregation,
category=category,
)
masking_equation = EQUATION.format(result="MASK", expression=masking)
grass.mapcalc(masking_equation, overwrite=True)
# zoom to MASK
g.region(zoom="MASK",
nsres=ns_resolution,
ewres=ew_resolution,
quiet=True)
# Count number of cells within each land category
r.stats_zonal(
flags="r",
base=base,
cover=highest_spectrum,
method="count",
output=cells,
overwrite=True,
quiet=True,
)
cells_categories = grass.parse_command("r.category",
map=cells,
delimiter="\t")
grass.debug(_("Cells: {c}".format(c=cells_categories)))
# Build cell category and label rules for `r.category`
cells_rules = "\n".join([
"{0}:{1}".format(key, value)
for key, value in cells_categories.items()
])
# Discard areas out of MASK
copy_equation = EQUATION.format(result=cells, expression=cells)
r.mapcalc(copy_equation, overwrite=True)
# Reassign cell category labels
r.category(map=cells, rules="-", stdin=cells_rules, separator=":")
# Compute extent of each land category
extent_expression = "@{cells} * area()"
extent_expression = extent_expression.format(cells=cells)
extent_equation = EQUATION.format(result=extent,
expression=extent_expression)
r.mapcalc(extent_equation, overwrite=True)
# Write extent figures as labels
r.stats_zonal(
flags="r",
base=base,
cover=extent,
method="average",
output=extent,
overwrite=True,
verbose=False,
quiet=True,
)
# Write land suitability scores as an ASCII file
temporary_reclassified_base_map = temporary_filename(
filename=reclassified_base)
suitability_scores_as_labels = string_to_file(
SUITABILITY_SCORES_LABELS,
filename=temporary_reclassified_base_map)
remove_files_at_exit(suitability_scores_as_labels)
# Write scores as raster category labels
r.reclass(
input=base,
output=base_scores,
rules=suitability_scores_as_labels,
overwrite=True,
quiet=True,
verbose=False,
)
remove_map_at_exit(base_scores)
# Compute weighted extents
weighted_expression = "@{extent} * float(@{scores})"
weighted_expression = weighted_expression.format(extent=extent,
scores=base_scores)
weighted_equation = EQUATION.format(result=weighted,
expression=weighted_expression)
r.mapcalc(weighted_equation, overwrite=True)
# Write weighted extent figures as labels
r.stats_zonal(
flags="r",
base=base,
cover=weighted,
method="average",
output=weighted,
overwrite=True,
verbose=False,
quiet=True,
)
# Get weighted extents in a dictionary
weighted_extents = grass.parse_command("r.category",
map=weighted,
delimiter="\t")
# Compute the sum of all weighted extents and add to dictionary
category_sum = sum([
float(x) if not math.isnan(float(x)) else 0
for x in weighted_extents.values()
])
weighted_extents["sum"] = category_sum
# Create a map to hold fractions of each weighted extent to the sum
# See also:
# https://grasswiki.osgeo.org/wiki/LANDSAT#Hint:_Minimal_disk_space_copies
r.reclass(
input=base,
output=fractions,
rules="-",
stdin="*=*",
verbose=False,
quiet=True,
)
# Compute weighted fractions of land types
fraction_category_label = {
key: float(value) / weighted_extents["sum"]
for (key, value) in weighted_extents.iteritems()
if key is not "sum"
}
# Build fraction category and label rules for `r.category`
fraction_rules = "\n".join([
"{0}:{1}".format(key, value)
for key, value in fraction_category_label.items()
])
# Set rules
r.category(map=fractions,
rules="-",
stdin=fraction_rules,
separator=":")
# Assert that sum of fractions is ~1
fraction_categories = grass.parse_command("r.category",
map=fractions,
delimiter="\t")
fractions_sum = sum([
float(x) if not math.isnan(float(x)) else 0
for x in fraction_categories.values()
])
msg = "Fractions: {f}".format(f=fraction_categories)
grass.debug(_(msg))
# g.message(_("Sum: {:.17g}".format(fractions_sum)))
assert abs(fractions_sum - 1) < 1.0e-6, "Sum of fractions is != 1"
# Compute flow
flow_expression = "@{fractions} * @{flow}"
flow_expression = flow_expression.format(fractions=fractions,
flow=flow_in_base)
flow_equation = EQUATION.format(result=flow,
expression=flow_expression)
r.mapcalc(flow_equation, overwrite=True)
# Write flow figures as raster category labels
r.stats_zonal(
base=reclassified_base,
flags="r",
cover=flow,
method="sum",
output=flow_in_category,
overwrite=True,
verbose=False,
quiet=True,
)
# Parse flow categories and labels
flow_categories = grass.parse_command("r.category",
map=flow_in_category,
delimiter="\t")
grass.debug(_("Flow: {c}".format(c=flow_categories)))
# Build flow category and label rules for `r.category`
flow_rules = "\n".join([
"{0}:{1}".format(key, value)
for key, value in flow_categories.items()
])
# Discard areas out of MASK
# Check here again!
# Output patch of all flow maps?
copy_equation = EQUATION.format(result=flow_in_category,
expression=flow_in_category)
r.mapcalc(copy_equation, overwrite=True)
# Reassign cell category labels
r.category(map=flow_in_category,
rules="-",
stdin=flow_rules,
separator=":")
# Update title
reclassified_base_title += " " + category
r.support(flow_in_category, title=reclassified_base_title)
# debugging
# r.report(
# flags='hn',
# map=(flow_in_category),
# units=('k','c','p'),
# )
if print_only:
r.stats(
input=(flow_in_category),
output="-",
flags="nacpl",
separator=COMMA,
quiet=True,
)
if not print_only:
if flow_column_name:
flow_column_prefix = flow_column_name + category
else:
flow_column_name = "flow"
flow_column_prefix = flow_column_name + category
# Produce vector map(s)
if vector:
# The following is wrong
# update_vector(vector=vector,
# raster=flow_in_category,
# methods=METHODS,
# column_prefix=flow_column_prefix)
# What can be done?
# Maybe update columns of an existing map from the columns of
# the following vectorised raster map(s)
# ?
raster_to_vector(raster=flow_in_category,
vector=flow_in_category,
type="area")
# get statistics
dictionary = get_raster_statistics(
map_one=aggregation, # reclassified_base
map_two=flow_in_category,
separator="|",
flags="nlcap",
)
# merge 'dictionary' with global 'statistics_dictionary'
statistics_dictionary = merge_two_dictionaries(
statistics_dictionary, dictionary)
# It is important to remove the MASK!
r.mask(flags="r", quiet=True)
# FIXME
# Add "reclassified_base" map to "remove_at_exit" here, so as to be after
# all reclassified maps that derive from it
# remove the map 'reclassified_base'
# g.remove(flags='f', type='raster', name=reclassified_base, quiet=True)
# remove_map_at_exit(reclassified_base)
if not print_only:
r.patch(flags="",
input=flows,
output=flow_in_reclassified_base,
quiet=True)
if vector:
# Patch all flow vector maps in one
v.patch(
flags="e",
input=flows,
output=flow_in_reclassified_base,
overwrite=True,
quiet=True,
)
# export to csv
if supply_filename:
supply_filename += CSV_EXTENSION
nested_dictionary_to_csv(supply_filename, statistics_dictionary)
if use_filename:
use_filename += CSV_EXTENSION
uses = compile_use_table(statistics_dictionary)
dictionary_to_csv(use_filename, uses)
# Maybe return list of flow maps? Requires unique flow map names
return flows
def extract_pixels(self, rast_name, use_cats=False, as_df=False):
"""Extract pixel values from a RasterStack using another RasterRow
object of labelled pixels
Parameters
----------
rast_name : str
Name of GRASS GIS raster map containing labelled pixels.
use_cats : bool (default is False)
Whether to return pixel values as category labels instead of
numeric values if the rast_name map has categories assigned to
it. Note that if some categories are missing in the rast_name
map then this option is ignored.
as_df : bool (opt). Default is False
Whether to return the extracted RasterStack pixels as a Pandas
DataFrame.
"""
# some checks
if RasterRow(rast_name).exist() is False:
gs.fatal("The supplied raster does not exist")
# check for categories in labelled pixel map
with RasterRow(rast_name) as src:
labels = src.cats
if "" in labels.labels() or use_cats is False:
labels = None
# extract predictor values at pixel locations
data = r.stats(
input=[rast_name] + self.names,
separator="pipe",
flags=["n", "g"],
stdout_=PIPE,
).outputs.stdout
if data == "":
gs.fatal("The training pixel locations do not spatially "
"intersect any raster datasets")
data = data.strip().split(os.linesep)
data = [i.split("|") for i in data]
data = np.asarray(data).astype("float32")
# remove x,y columns from array indexes 1 and 2
data = data[:, 2:]
y = data[:, 0]
X = data[:, 1:]
if (y % 1).all() == 0:
y = y.astype("int")
cat = np.arange(0, y.shape[0])
if labels and use_cats is True:
enc = CategoryEncoder()
enc.fit(labels)
y = enc.transform(y)
if as_df is True:
df = pd.DataFrame(
data=np.column_stack((cat, y, X)),
columns=["cat"] + [rast_name] + self.names,
)
return df
return X, y, cat
