resolution = 10
plane = False # on curve
w = rdggs.cell_width(resolution)
if plane:
area = w**2
else:
area = 8 / (3 * math.pi) * w**2
# change to metres with one decimal place
w = (" %2.0f m" % (w))
# print ()
# calculate the dggs cell from long and lat ie t
thisCell = rdggs.cell_from_point(
resolution, t, plane=False) # false = on the curve
dggsCell = str(thisCell)
#find the boundary for exporting into ESRI or GDAL
dggsLoc = list() # empty list ready to fill
for item in dggsCell: # build a dggs location cell as a list like dggsLoc = ['R', 7, 2, 4, 5, 6, 3, 2, 3, 4, 3, 8, 3]
if item.isalpha(): # the letter 'R' at the beginning
dggsLoc.append(item)
else:
item = int(item) # the numbers in the cell
dggsLoc.append(item)
c = rdggs.cell(dggsLoc)
# print (c)
bound = list()
# put in try statement for Tasmanian ones that produce an error?
print('crs', testfile.crs) # the coordinate reference system
print('attributes', testfile.all_attributes) # retrieves the combined set of all feature attributes
print('common attributes', testfile.common_attributes) # retrieves only those field attributes that are common to all features
print()
# make an output file of DGGS centroid points with the at atttibute properties
newfile = pygeoj.new() # default projection is WGS84
#work through the features (polygons) one by one and ask for DGGS cells
for feature in testfile:
print('feature attributes ', feature.properties) # the feature attributes - want to keep for output
coords = feature.geometry.coordinates # xy
print('geom', coords)
this_dggs_cell = rdggs.cell_from_point(resolution, coords, plane=False) # false = on the elipsoidal curve
print('found cell = ', this_dggs_cell)
my_prop = feature.properties
my_Cell = {"AusPIX_DGGS": str(this_dggs_cell), "LongiWGS84": coords[0], "LatiWGS84": coords[1], "CellArea_M2": resArea}
#include the AusPIX cell information in attributes
these_attributes = dict(list(my_Cell.items()) + list(my_prop.items()))
#print('these attributes = ', these_attributes)
newfile.add_feature(properties=these_attributes, geometry={"type": "Point", "coordinates": coords})
#save the ouput geojson file
newfile.save("test_points.geojson") # saves into the folder where you have the script - edit to change