GeoJModelBuilder is an open-source, Java-based geoprocessing workflow tool specifically engineered to automate and integrate Web Processing Services (WPS) and standard Open Geospatial Consortium (OGC) data protocols. Unlike desktop-bound options like Esri’s ArcGIS ModelBuilder, GeoJModelBuilder acts as a bridge for distributed, web-based GIS web services. It allows users to build, chain, and execute complex spatial analysis tasks directly in an open web environment.
A step-by-step guide walks through getting started with GeoJModelBuilder, from setting up the workspace to running a collaborative geoprocessing workflow. Step 1: Set Up and Install the Workspace
Because GeoJModelBuilder is an open-source tool, you must configure its environment properly.
Download the Repository: Access the official source code repository via the GeoPW GeoJModelBuilder GitHub platform.
Verify System Requirements: Ensure you have the Java Development Kit (JDK) installed on your system.
Launch the Builder: Execute the core .jar file to boot the visual user interface, which provides a flexible drag-and-drop workflow canvas. Step 2: Register Distributed Geospatial Web Services
GeoJModelBuilder operates by chaining remote web services instead of local hard-drive datasets.
Identify Data and Tools: Locate your desired OGC standard services, such as Web Feature Services (WFS) for vector data, Web Coverage Services (WCS) for raster layers, and Web Processing Services (WPS) for algorithms.
Bind Resources: Use the tool’s interface to input the service URLs and dynamically register the distributed geoprocessing utilities into your session’s toolkit. Step 3: Drag, Drop, and Bind the Workflow Canvas
Once your external services and web data are mapped, you can visually program the modeling logic.
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