O V E R V I E W
Geoprocessing is a fundamental part of enterprise GIS operations. Geoprocessing provides the data analysis, data management, and data conversion tools necessary for all GIS users.
A geoprocessing service represents a collection of published tools that perform tasks necessary for manipulating and analyzing geographic information across a wide range of disciplines. Each tool performs one or more operations, such as projecting a dataset from one map projection to another, adding fields to a table, or creating buffer zones around features. A tool accepts inputs (such as feature sets, tables, property values), executes operations against the input data, and generates output for presentation in a map or further processing by the client. Tools can be executed synchronously or asynchronously.
Use a geoprocessing service to:
List available tools and their input/output properties
Execute a tool synchronously
Submit a job and execute a tool asynchronously
Return messages on the status of a job
Cancel a job
Display results using a map service
Retrieve results for further processing on the client
Many uses of GIS involve the repetition of
work, and this creates the need for a framework to provide automation
of workflows. Geoprocessing services answer this need by providing a mechanism
to combine a series of operations in a sequence using a model and exposing
the model as a tool.
Inputs and outputs to geoprocessing services consist of strong types deriving
from GPValue. Here
is a list of valid types:
|
GPValue Type |
Description |
|
Stores boolean values.
| |
|
Stores data file contents.
| |
|
Stores date values.
| |
|
Stores double values.
| |
|
Stores record sets that contain features.
| |
|
Stores linear unit definitions.
| |
|
Stores long values.
| |
|
Stores multiple geoprocessing value objects.
| |
|
Stores raster data contents of a defined format.
| |
|
Stores raster data contents to display in a map.
| |
|
|
Stores tabular data.
|
|
Stores string values.
|
These types assist you when in just about every
aspect to server tool usage via a geoprocessing service. They
are used to describe inputs to a server tool, such as the type of parameters
returned from a call to GetToolInfo
or GetToolInfos. When
initiating request to a server tool for processing via Execute
or SubmitJob the array of input values
must consist of these types. Results from a server tool (e.g. GetJobResult)
are defined using these types.
WSDL syntax
http://<Web
Server Hostname>/<ArcGIS
Instance>/services/<ServiceName>/GPServer?wsdl
Methods
|
Proxy method |
Description |
|
Cancels a pending job on the server.
| |
|
Executes a synchronous geoprocessing tool.
| |
|
Gets the type of execution, either synchronous or asynchronous.
| |
|
Gets the execution environment values for a geoprocessing job.
| |
|
Gets the input values for a job.
| |
|
Gets verbose messages representing the current state of a submitted geoprocessing job.
| |
|
Gets the results of a geoprocessing job that has completed successfully.
| |
|
Gets the map extent for the results for a job.
| |
|
Gets the result options for a job.
| |
|
Gets the current status of a geoprocessing job.
| |
|
Gets the name of the tool used for a job.
| |
|
Gets the name of the map service that may be used to render results.
| |
|
Gets either a zip file of results generated by a geoprocessing job or the URL indicating the location of that file.
| |
|
Gets information about tasks (or tools) in a geoprocessing service which uses the data types supported by the desktop application ArcGIS Explorer.
| |
|
Gets a list of task (or tool) names in a geoprocessing service that meets the data requirements to be a task consumed by ArcGIS Explorer.
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|
Gets information on a specific tool (or task) in a geoprocessing service.
| |
|
Gets information about tools (or tasks) in a geoprocessing service.
| |
|
Gets a list of all tool names in a geoprocessing service.
| |
|
Executes an asynchronous geoprocessing tool.
|