Create Bands From Raster

Résumé

Creates an elevation bands feature class from a Digital Terrain Elevation Data (DTED) raster dataset. The resulting feature class is used by the Elevation Guide Bar surround element to display the high and low elevation areas on a topographic map (TM) using a series of hypsometric gray bands.

Utilisation

• Only a single area of interest (AOI) can be selected.

• The raster extent must be equal to or greater than the AOI extent.

• The Input Hydro Exclusion Features parameter is used for large water bodies and coastal areas that would significantly alter the area of the elevation bands.

Syntaxe

arcpy.defense.CreateBandsFromRaster(in_aoi, in_raster, out_features, in_min_area, in_tolerance, {in_hydro_exclusion}, {in_number_of_bands}, {in_contour_interval})

Paramètre	Explication	Type de données
in_aoi	A feature layer that describes the processing extent. The feature layer must have one selected feature and that feature is typically stored in an index feature class.	Feature Layer
in_raster [in_raster,...]	The rasters to use to create elevation bands.	Raster Layer
out_features	The feature class that will contain the banding features.	Feature Class
in_min_area	The minimum area for output polygons. Features smaller than this value will be removed. The default value is 0.00016 square decimal degrees. Remarque : If you are creating an output dataset with a projected coordinate system, this value should reflect the square units of that coordinate system—for example, square meters for a UTM dataset. Otherwise, the default value may result in an empty output dataset.	Double
in_tolerance	The tolerance used by the smoothing algorithm. The larger the value, the more generalized the output band features. The default is 0.002 decimal degrees.	Linear Unit
in_hydro_exclusion (Facultatif)	The features used to define large water body areas that need to be excluded from the elevation band area calculations.	Feature Layer
in_number_of_bands (Facultatif)	Specifies the number of guide bands generated by the tool.	Long
in_contour_interval (Facultatif)	Specifies the contour interval used to determine the closest contour available when calculating the band area. Bands are created with their limits aligned to the set contour interval, except low and high values, which will represent their actual calculated values. 10 —A contour interval of 10 will be used. 20 —A contour interval of 20 will be used. This is the default. 40 —A contour interval of 40 will be used. 80 —A contour interval of 80 will be used.	String

Exemple de code

CreateBandsFromRaster example (Python window)

This Python sample creates a raster layer from production mapping sample data. The script runs the CreateBandsFromRaster function against the raster layer and writes the output to a file geodatabase at c:\Sample. You need to have the ArcGIS Spatial Analyst extension and Production Mapping extensions enabled.

# Importing necessary modules
from arcpy import defense, management

# Setting parameters for tool
aoi = r'C:\Program Files (x86)\ArcGIS\EsriDefenseMapping\Desktop10.4\ReferenceData\MapIndex.gdb\MapIndex\TLM50_Index'
raster = r'C:\Sample\Monterey.dt2'
outputfeatures = r'C:\Sample\Default.gdb\BandsFromRaster'
minarea = '0.00016'
tolerance = '0.02 DecimalDegrees'
hydroexclusion = r'C:\Sample\MGCP_TRD_4_2.gdb\MGCP\CoastA'
numberofbands = 3
contourInterval = 20

# Creating feature layer and selecting NRN for AOI
selstring = 'NRN = "V795X16573"'
management.MakeFeatureLayer(aoi, 'AOI')
management.SelectLayerByAttribute('AOI', 'NEW_SELECTION', selstring)

# Calling Create Bands From Raster
defense.CreateBandsFromRaster('AOI', raster, outputfeatures, minarea, tolerance, hydroexclusion, numberofbands, contourInterval)

Environnements

• Espace de travail courant

Informations de licence

• Basic: Non
• Standard: Non
• Advanced: Requiert Defense Mapping