Label | Explanation | Data Type |
Input OPeNDAP URL | The URL that references the remote OPeNDAP dataset. The URL should resolve to the dataset level (for example, file name), not a directory name. | File; String |
Variable | The variable from the OPeNDAP dataset that will be used to create the raster layer. | String |
X Dimension | The dimension of the OPeNDAP dataset used to define the x, or longitude, coordinates of the output raster layer. | String |
Y Dimension | The dimension of the OPeNDAP dataset used to define the y, or latitude, coordinates of the output raster layer. | String |
Output Raster Layer | The name of the output raster layer. | Raster Layer |
Extent (Optional) | The output extent of the raster layer. Specify the extent coordinates in the units of the OPeNDAP data source (these could be latitude-longitude, projected coordinates, or some arbitrary grid coordinates). The purpose of this parameter is to allow subsetting to an area of interest or to reduce the size of the data that is transferred. | Envelope |
Dimension Values (Optional) | The starting and ending values of the dimensions or dimensions used to constrain which data will be extracted from the remote OPeNDAP server. By default, the minimum and maximum values of the dimension or dimensions will be used.
| Value Table |
Value Selection Method (Optional) | Specifies the dimension value selection method that will be used.
| String |
Cell Registration (Optional) | Specifies how the cells will be registered with respect to the x,y coordinate.
| String |
Summary
Creates a raster layer from data stored on an OPeNDAP server.
Usage
The performance of this tool depends on the speed of the remote OPeNDAP server and the robustness of the Internet connection between the machine executing the tool and the remote server.
To create a raster layer, the spacing of the x-coordinates must be equal and the spacing between the y-coordinates of the remote data must be equal. This is often referred to as regularly gridded data.
Use the Cell Registration parameter (cell_registration in Python) to specify how the extent of the netCDF raster layer will be computed from the x dimension and y dimension values. The cell size, number of rows, number of columns, and the width and height of the output raster remain the same, regardless of the option used.
Parameters
arcpy.management.MakeOPeNDAPRasterLayer(in_opendap_URL, variable, x_dimension, y_dimension, out_raster_layer, {extent}, {dimension_values}, {value_selection_method}, {cell_registration})
Name | Explanation | Data Type |
in_opendap_URL | The URL that references the remote OPeNDAP dataset. The URL should resolve to the dataset level (for example, file name), not a directory name. | File; String |
variable | The variable from the OPeNDAP dataset that will be used to create the raster layer. | String |
x_dimension | The dimension of the OPeNDAP dataset used to define the x, or longitude, coordinates of the output raster layer. | String |
y_dimension | The dimension of the OPeNDAP dataset used to define the y, or latitude, coordinates of the output raster layer. | String |
out_raster_layer | The name of the output raster layer. | Raster Layer |
extent (Optional) | The output extent of the raster layer. Specify the extent coordinates in the units of the OPeNDAP data source (these could be latitude-longitude, projected coordinates, or some arbitrary grid coordinates). The purpose of this parameter is to allow subsetting to an area of interest or to reduce the size of the data that is transferred. | Envelope |
dimension_values [[dimension, {start_value}, {end_value}],...] (Optional) | The starting and ending values of the dimensions or dimensions used to constrain which data will be extracted from the remote OPeNDAP server. By default, the minimum and maximum values of the dimension or dimensions will be used.
| Value Table |
value_selection_method (Optional) | Specifies the dimension value selection method that will be used.
| String |
cell_registration (Optional) | Specifies how the cells will be registered with respect to the x,y coordinate.
| String |
Code sample
Creates an OPeNDAP raster layer.
import arcpy
arcpy.md.MakeOPeNDAPRasterLayer("http://cida.usgs.gov/thredds/dodsC/new_gmo",
"pr", "longitude", "latitude", "pr_Layer",
"-124.6875 25.1875 -67.0625 52.8125",
"time '01/01/1949 12:00:00 AM' '12/31/2010 12:00:00 AM'", "BY_VALUE")
Creates an OPeNDAP raster layer.
# Name: MakeOPeNDAPRasterLayer_Ex_02.py
# Description: Create an OPeNDAP raster layer from a netCDF file.
# Requirements: None
# Import system modules
import arcpy
# Set local variables
in_opendap_URL = "http://cida.usgs.gov/thredds/dodsC/new_gmo"
variable = "pr"
XDimension = "longitude"
YDimension = "latitude"
outRasterLayer = "pr_Layer"
extent = "-124.6875 25.1875 -67.0625 52.8125"
dimensionValues = "time '01/01/1949 12:00:00 AM' '12/31/2010 12:00:00 AM'"
valueSelectionMethod = "BY_VALUE"
cellRegistration = ""
# Execute MakeNetCDFRasterLayer
arcpy.md.MakeOPeNDAPRasterLayer(in_opendap_URL, variable, XDimension, YDimension,
outRasterLayer, extent, dimensionValues,
valueSelectionMethod, cellRegistration)