def las_to_GandFrreturns(las_files, mask, name):
'''This function takes a list of las files, creates a las dataset. Then
it create a lasd for first and ground returns. After which it rasterizes
the lasd and masks them to a specified area.
las_files: a list of the paths for all the las files
mask:
'''
lasd = arcpy.CreateLasDataset_management(las_files, name)
g_lasd = arcpy.MakeLasDatasetLayer_management(lasd, "ground", 2)
g_ras = arcpy.LasDatasetToRaster_conversion(
g_lasd, "g_rast.img", "ELEVATION", "BINNING AVERAGE NATURAL_NEIGHBOR",
"FLOAT", "CELLSIZE", 0.5)
g_mask = arcpy.sa.ExtractByMask(g_ras, mask)
g_mask.save("g_mask" + name + ".img")
f_lasd = arcpy.MakeLasDatasetLayer_management(lasd, "first", '', 1)
f_ras = arcpy.LasDatasetToRaster_conversion(
f_lasd, "f_rast.img", "ELEVATION", "BINNING MAXIMUM NATURAL_NEIGHBOR",
"FLOAT", "CELLSIZE", 0.5)
f_mask = arcpy.sa.ExtractByMask(f_ras, mask, name)
f_mask.save("f_mask" + name + ".img")
return f_mask, g_mask
'raster': os.path.join(support_folder, 'dhm.tif'),
'name': 'height'
}
intensity_files = {
'multipoint': None,
'tin': None,
'raster': os.path.join(support_folder, 'intensity.tif'),
'rawraster': os.path.join(support_folder, 'intensity.tif'),
'name': 'intensity'
}
arcpy.AddMessage("Generating DSM")
surfaceLyr = arcpy.CreateUniqueName('First Return Layer')
arcpy.MakeLasDatasetLayer_management(
in_las_dataset=inlasd,
out_layer=surfaceLyr,
class_code=None,
return_values=['Single Return', 'First of Many'])
arcpy.LasDatasetToRaster_conversion(
in_las_dataset=surfaceLyr,
out_raster=surface_files['rawraster'],
value_field='ELEVATION',
interpolation_type=
"TRIANGULATION NATURAL_NEIGHBOR NO_THINNING CLOSEST_TO_MEAN 0",
# 'TRIANGULATION Linear {point_thinning_type} {point_selection_method} {resolution}',
data_type='FLOAT',
sampling_type='CELLSIZE',
sampling_value=cell_edge_length,
z_factor=z_factor)
arcpy.AddMessage("Generating DEM")
def task(target_lasd, task_dir, dictionary):
print('Starting Task: ', dictionary[0])
try:
# Get Task ID
task_id = dictionary[0]
# Create Working Directory for Task Output
dir_name = task_id + '__' + str(os.getpid()) + '__'
working_dir = tempfile.mkdtemp(prefix=dir_name, dir=task_dir)
# Set Extent for Task Processing
proc_ext = dictionary[1]
XMin = proc_ext[0]
YMin = proc_ext[1]
XMax = proc_ext[2]
YMax = proc_ext[3]
arcpy.env.extent = arcpy.Extent(XMin, YMin, XMax, YMax)
# Create LAS Dataset Layer
filter_name = 'in_memory/lasd_lyr_' + task_id
filter_lasd = arcpy.MakeLasDatasetLayer_management(
target_lasd, filter_name, '2;8')
# A - Create Raster
a_name = os.path.join(working_dir, 'a.tif')
a = arcpy.LasPointStatsAsRaster_management(filter_lasd, a_name,
'POINT_COUNT', 'CELLSIZE',
'10')
# B - Zero Raster
b = arcpy.Raster(a) * 0
b.save(os.path.join(working_dir, 'b.tif'))
# B - Raster To Poly
b_rtp_name = os.path.join(working_dir, 'b_rtp.shp')
b_rtp = arcpy.RasterToPolygon_conversion(b, b_rtp_name, 'True',
'VALUE')
# B - Get Envelope Based On Inner/Outer Grid Cell
b_env_name = os.path.join(working_dir, 'b_env.shp')
if task_id.endswith('_'):
b_env = arcpy.MinimumBoundingGeometry_management(
b_rtp, b_env_name, "ENVELOPE", "ALL")
else:
b_env = arcpy.MinimumBoundingGeometry_management(
b_rtp, b_env_name, "CONVEX_HULL", "ALL")
# C - Reclassify Raster
c = arcpy.sa.Reclassify(b, 'VALUE', '0 0; NODATA 1')
c.save(os.path.join(working_dir, 'c.tif'))
# C - Raster To Poly
c_rtp_name = os.path.join(working_dir, 'c_rtp.shp')
c_rtp = arcpy.RasterToPolygon_conversion(c, c_rtp_name, 'False',
'VALUE')
# D - Clip c_rtp by b_env
d_name = os.path.join(working_dir, 'd.shp')
d = arcpy.Clip_analysis(c_rtp, b_env, d_name)
# Create Acres Field & Calculate on Merged D
arcpy.AddField_management(d, 'ACRES', 'DOUBLE')
arcpy.CalculateField_management(d, 'ACRES', '!shape.area@acres!')
# E - Select & Copy Features
e_sel_criteria = '"gridcode" = 1 AND "ACRES" > 1.5'
e_sel_layer_name = 'e_sel_lyr_' + task_id
e_sel_layer = arcpy.MakeFeatureLayer_management(
d, e_sel_layer_name, e_sel_criteria)
e_name = os.path.join(working_dir, 'e.shp')
arcpy.CopyFeatures_management(e_sel_layer, e_name)
arcpy.Delete_management(e_sel_layer)
# F - Select & Copy Features
f_sel_criteria = '"gridcode" = 0'
f_sel_layer_name = 'f_sel_lyr_' + task_id
f_sel_layer = arcpy.MakeFeatureLayer_management(
c_rtp, f_sel_layer_name, f_sel_criteria)
f_name = os.path.join(working_dir, 'f.shp')
arcpy.CopyFeatures_management(f_sel_layer, f_name)
arcpy.Delete_management(f_sel_layer)
# Clear LAS Dataset Layer
arcpy.Delete_management(filter_name)
# Write Text File As Completion Flag
open(os.path.join(working_dir, task_id + '.txt'), 'a').close()
except Exception as e:
print('Task Dropped: ', task_id)
print('Exception: ', e)
print('Finished Task: ', dictionary[0])
return task_id
else:
print("%s exists!" % lasD)
cellSize = 2
zFactor = ""
arcpy.env.workspace = outLAS
#Create DEM
outDEMras = os.path.join(outDEM, nm + '_DEM_full.tif')
print("Begin %s processing..." % (nm + '_DEM_full.tif'))
lasDEM = arcpy.CreateUniqueName(nm + '_DEM_full')
returnValue = '' #[2,9]#'ANY'#['LAST', 'SINGLE']
class_code = [2, 9]
print(" Creating LAS layer...")
arcpy.MakeLasDatasetLayer_management(lasD, lasDEM, class_code)
print(" Creating surface...")
arcpy.conversion.LasDatasetToRaster(lasDEM, outDEMras, 'ELEVATION',
'BINNING MINIMUM NATURAL_NEIGHBOR',
'FLOAT', 'CELLSIZE', cellSize, zFactor)
print("%s processing completed!" % nm + '_DEM.tif')
#Create DSM
outDSMras = os.path.join(outDSM, nm + '_DSM_full.tif')
print("Begin %s processing..." % (nm + '_DSM_full.tif'))
lasDSM = arcpy.CreateUniqueName(nm + '_DSM_full')
#returnValue = [3,4,5]#['FIRST', 'SINGLE']#[3,4,5]
class_code = [0, 1, 2, 3, 4, 5, 9]
print(" Creating LAS layer...")
arcpy.MakeLasDatasetLayer_management(lasD, lasDSM, class_code)
print(" Creating surface...")
def extract(lc_lasd, lc_ws, lc_class_code, lc_cell_size, lc_min_bridge_area,
lc_extrapolate, lc_output_features, lc_log_dir, lc_debug,
lc_memory_switch):
try:
# create dem
desc = arcpy.Describe(lc_lasd)
if desc.spatialReference.linearUnitName in ['Foot_US', 'Foot']:
unit = 'Feet'
else:
unit = 'Meters'
ground_code = 2
# get class codes
class_code_string = desc.classCodes
# get point spacing
point_spacing = desc.pointSpacing
# get lidar class code
msg_body = create_msg_body(
"Looking for class code: " + str(lc_class_code), 0, 0)
msg(msg_body)
class_code_list = class_code_string.split(";")
# old way
# class_code_list = common_lib.get_las_class_codes(lc_lasd, lc_log_dir)
# Generate raster from lasd
if str(lc_class_code) in class_code_list:
if arcpy.Exists(lc_output_features):
arcpy.Delete_management(lc_output_features)
msg_body = create_msg_body(
"Creating bridge surfaces using the following class codes: " +
str(lc_class_code), 0, 0)
msg(msg_body)
bridge_ld_layer = arcpy.CreateUniqueName('bridge_ld_lyr')
# Filter for bridge points
arcpy.MakeLasDatasetLayer_management(lc_lasd,
bridge_ld_layer,
class_code=str(lc_class_code))
# create dsm from las with just bridge codes
if lc_memory_switch:
dsm = "in_memory/dsm"
else:
dsm = os.path.join(lc_ws, "dsm")
if arcpy.Exists(dsm):
arcpy.Delete_management(dsm)
if arcpy.Exists(dsm):
arcpy.Delete_management(dsm)
arcpy.conversion.LasDatasetToRaster(bridge_ld_layer,
dsm,
'ELEVATION',
'BINNING MAXIMUM LINEAR',
sampling_type='CELLSIZE',
sampling_value=lc_cell_size)
arcpy.ResetEnvironments()
arcpy.env.workspace = lc_ws
arcpy.env.overwriteOutput = True
# extrapolate dsm for better interpolation
if lc_extrapolate:
dsm_outer = extrapolate_raster(lc_ws, dsm, lc_cell_size,
lc_log_dir, lc_debug,
lc_memory_switch)
# merge rasters
listRasters = []
listRasters.append(dsm)
listRasters.append(dsm_outer)
outer_dsm_name = "dms_plus_outer"
desc = arcpy.Describe(listRasters[0])
arcpy.MosaicToNewRaster_management(listRasters, lc_ws,
outer_dsm_name,
desc.spatialReference,
"32_BIT_FLOAT",
lc_cell_size, 1, "MEAN", "")
dsm = os.path.join(lc_ws, outer_dsm_name)
# create raster using LASPointStatisticsAsRaster
if lc_memory_switch:
las_point_stats = "in_memory/las_point_stats"
else:
las_point_stats = os.path.join(lc_ws, "las_point_stats")
if arcpy.Exists(las_point_stats):
arcpy.Delete_management(las_point_stats)
if arcpy.Exists(las_point_stats):
arcpy.Delete_management(las_point_stats)
msg_body = create_msg_body(
"Creating points statistics raster using the following class codes: "
+ str(lc_class_code), 0, 0)
msg(msg_body)
arcpy.management.LasPointStatsAsRaster(bridge_ld_layer,
las_point_stats,
"PREDOMINANT_CLASS",
"CELLSIZE",
2 * lc_cell_size)
lc_memory_switch = False
# convert to polygon
if lc_memory_switch:
bridge_polys = "in_memory/bridge_polys"
else:
bridge_polys = os.path.join(lc_ws, "bridge_polys")
if arcpy.Exists(bridge_polys):
arcpy.Delete_management(bridge_polys)
msg_body = create_msg_body("Creating polygons from raster", 0, 0)
msg(msg_body)
arcpy.conversion.RasterToPolygon(las_point_stats, bridge_polys,
"SIMPLIFY", "Value",
"SINGLE_OUTER_PART", None)
# eliminate holes
if lc_memory_switch:
bridge_polys2 = "memory/bridge_polys2"
else:
bridge_polys2 = os.path.join(lc_ws, "bridge_polys2")
if arcpy.Exists(bridge_polys2):
arcpy.Delete_management(bridge_polys2)
msg_body = create_msg_body("Eliminating holes from polygons", 0, 0)
msg(msg_body)
arcpy.management.EliminatePolygonPart(bridge_polys, bridge_polys2,
"AREA", "20 SquareMeters", 0,
"ANY")
# regularize footprints
if lc_memory_switch:
bridge_polys3 = "memory/bridge_polys3"
else:
bridge_polys3 = os.path.join(lc_ws, "bridge_polys3")
if arcpy.Exists(bridge_polys3):
arcpy.Delete_management(bridge_polys3)
msg_body = create_msg_body("Regularizing polygons...", 0, 0)
msg(msg_body)
arcpy.ddd.RegularizeBuildingFootprint(bridge_polys2, bridge_polys3,
"ANY_ANGLE",
2 * lc_cell_size,
2 * lc_cell_size, 0.25, 1.5,
0.1, 1000000)
# interpolate shape on the dsm
if lc_memory_switch:
bridge_polys5 = "memory/bridge_polys5"
else:
bridge_polys5 = os.path.join(lc_ws, "bridge_polys5")
if arcpy.Exists(bridge_polys5):
arcpy.Delete_management(bridge_polys5)
msg_body = create_msg_body("Interpolating polygons...", 0, 0)
msg(msg_body)
if not lc_extrapolate:
if lc_memory_switch:
bridge_polys4 = "memory/bridge_polys4"
else:
bridge_polys4 = os.path.join(lc_ws, "bridge_polys4")
if arcpy.Exists(bridge_polys4):
arcpy.Delete_management(bridge_polys4)
if common_lib.get_xy_unit(bridge_polys3, 0) == "Feet":
buffer_text = "-" + str(lc_cell_size * 2) + " Feet"
else:
buffer_text = "-" + str(lc_cell_size * 2) + " Meters"
arcpy.analysis.Buffer(bridge_polys3, bridge_polys4,
buffer_text, "FULL", "ROUND", "NONE",
None, "PLANAR")
# densify buffer so the bridge surface will follow the dsm
arcpy.edit.Densify(bridge_polys4, "DISTANCE", "10 Meters",
"0.1 Meters", 10)
arcpy.ddd.InterpolateShape(dsm, bridge_polys4, bridge_polys5,
None, 1, "BILINEAR",
"VERTICES_ONLY", 0, "EXCLUDE")
else:
# densify buffer so the bridge surface will follow the dsm
arcpy.edit.Densify(bridge_polys3, "DISTANCE", "10 Meters",
"0.1 Meters", 10)
arcpy.ddd.InterpolateShape(dsm, bridge_polys3, bridge_polys5,
None, 1, "BILINEAR",
"VERTICES_ONLY", 0, "EXCLUDE")
valueAttribute = "Shape_Area"
expression = """{} > {}""".format(
arcpy.AddFieldDelimiters(bridge_polys5, valueAttribute),
lc_min_bridge_area)
msg_body = create_msg_body(
"Removing polygons with area smaller than " +
str(lc_min_bridge_area) + ".", 0, 0)
msg(msg_body)
# select all points with good elevation values
select_name = arcpy.CreateUniqueName('bridge_select_lyr')
select_lyr = arcpy.MakeFeatureLayer_management(
bridge_polys5, select_name).getOutput(0)
arcpy.SelectLayerByAttribute_management(select_lyr,
"NEW_SELECTION",
expression)
bridge_polys6 = lc_output_features + "_surfaces"
if arcpy.Exists(bridge_polys6):
arcpy.Delete_management(bridge_polys6)
arcpy.CopyFeatures_management(select_lyr, bridge_polys6)
return bridge_polys6
else:
msg_body = create_msg_body(
"Couldn't detect class code " + str(lc_class_code) +
" in las dataset. Exiting...", 0, 0)
msg(msg_body, WARNING)
return None
except arcpy.ExecuteError:
# Get the tool error messages
msgs = arcpy.GetMessages(2)
arcpy.AddError(msgs)
except Exception:
e = sys.exc_info()[1]
arcpy.AddMessage("Unhandled exception: " + str(e.args[0]))
arcpy.CheckOutExtension("Spatial")
# Create a LAS dataset
env.workspace = MainWorkspace
arcpy.management.CreateLasDataset(inputLAS, 'lasDataset.lasd', "RECURSION", "",
spatialRef, "COMPUTE_STATS")
print ("lAS Dataset created")
# Extract seperate LAS dataset and raster layers for Ground Returns and Canopy Returns.
ground_returns = r'in_memory\ground_returns'
canopy_returns = r'in_memory\canopy_returns'
arcpy.MakeLasDatasetLayer_management('lasDataset.lasd', ground_returns,
2, 'Last Return', 'INCLUDE_UNFLAGGED',
'EXCLUDE_SYNTHETIC', 'INCLUDE_KEYPOINT',
'EXCLUDE_WITHHELD')
arcpy.MakeLasDatasetLayer_management('lasDataset.lasd', canopy_returns,
'', ['First of Many', 1], 'INCLUDE_UNFLAGGED',
'EXCLUDE_SYNTHETIC', 'INCLUDE_KEYPOINT',
'EXCLUDE_WITHHELD')
env.workspace = FinalGDB
arcpy.conversion.LasDatasetToRaster(ground_returns, "DEM", 'ELEVATION',
'BINNING AVERAGE NATURAL_NEIGHBOR', 'FLOAT',
'CELLSIZE', '1', '1')
arcpy.conversion.LasDatasetToRaster(canopy_returns, "DSM", 'ELEVATION',
'BINNING AVERAGE NATURAL_NEIGHBOR', 'FLOAT',
'CELLSIZE', '1', '1')
print ("DEM and DSM created")
def createMXD(las_qainfo, target_path, project_ID):
mxd = None
try:
las_footprint_path = A04_C_ConsolidateLASInfo.getLasFootprintPath(
las_qainfo.filegdb_path)
lasd_boundary_path = A04_C_ConsolidateLASInfo.getLasdBoundaryPath(
las_qainfo.filegdb_path)
lasd_path = las_qainfo.las_dataset_path
out_map_file_path = os.path.join(target_path,
"{}.mxd".format(project_ID))
if os.path.exists(out_map_file_path):
arcpy.AddMessage("MXD exists: {}".format(out_map_file_path))
else:
mxd = arcpy.mapping.MapDocument(
os.path.join(os.path.dirname(os.path.realpath(__file__)),
"blank.mxd"))
mxd.saveACopy(out_map_file_path)
arcpy.AddMessage("Created MXD {}".format(out_map_file_path))
mxd = arcpy.mapping.MapDocument(out_map_file_path)
mxd.relativePaths = True
df = mxd.activeDataFrame
if not (isLayerExist(mxd, df, "LAS Footprints") or isLayerExist(
mxd, df,
"FootprintLASFile")): #Changed condition 3 Apr 2019 BJN
lyr_footprint = arcpy.MakeFeatureLayer_management(
las_footprint_path, "FootprintLASFile").getOutput(
0) #Changed layer name 27 Mar 2019 BJN
arcpy.mapping.AddLayer(df, lyr_footprint, 'BOTTOM')
arcpy.AddMessage("Added layer to mxd: {}".format(lyr_footprint))
if not (isLayerExist(mxd, df, "LAS Boundary") or isLayerExist(
mxd, df,
"BoundaryLASDataset")): #Changed condition 3 Apr 2019 BJN
lyr_boundary = arcpy.MakeFeatureLayer_management(
lasd_boundary_path, "BoundaryLASDataset").getOutput(
0) #Changed layer name 27 Mar 2019 BJN
arcpy.mapping.AddLayer(df, lyr_boundary, 'BOTTOM')
arcpy.AddMessage("Added layer to mxd: {}".format(lyr_boundary))
if not isLayerExist(mxd, df, "LAS Dataset"):
lyr_lasd = arcpy.MakeLasDatasetLayer_management(
lasd_path, "LAS Dataset").getOutput(0)
arcpy.mapping.AddLayer(df, lyr_lasd, 'TOP')
arcpy.AddMessage("Added layer to mxd: {}".format(lyr_lasd))
if not (isLayerExist(mxd, df, "LAS Boundary Difference")
or isLayerExist(mxd, df, "BoundaryLASDataset_SD")
): #Changed condition 3 Apr 2019 BJN
lasd_boundary_SD = "{}_SD".format(lasd_boundary_path)
lyr_diff = arcpy.MakeFeatureLayer_management(
lasd_boundary_SD, "BoundaryLASDataset_SD").getOutput(
0) #Changed layer name 27 Mar 2019 BJN
arcpy.mapping.AddLayer(df, lyr_diff, 'TOP')
arcpy.AddMessage("Added layer to mxd: {}".format(lyr_diff))
mxd.save()
except:
arcpy.AddWarning("Failed to set up project MXD")
return mxd
