Accessing the Hub
The original intention for building the North Dakota GIS Hub was to serve state agencies as a lot of duplication of effort and data was occurring. With a centralized Hub in place, state agencies should be spending less time locating the best available data, giving them more time for their assigned responsibilities and allowing them to provide better support to their customers, which includes the public.
State security requirements, computer system performance, and protection of the valuable data assets on the North Dakota GIS Hub define the need for an infrastructure that addresses these three requirements. This infrastructure creates an environment that distinguishes how people inside and outside of state government access the Hub.
The North Dakota GISTC believes that the public can be directly served by the Hub, at the same time meeting the original intention for the development of the Hub and the infrastructure requirements. For this reason, state agencies will access the GIS Hub by connecting to one of the GIS Hub databases or by using the web services. Non-state agencies will access the GIS Hub using the web services.
GIS Hub Databases
ArcGIS Desktop or ArcGIS Explorer can be used to connect to one of the GIS Hub databases. In order to connect to one of the databases, you must:
- Be a member of a North Dakota state agency, within the internal state network
- Must Have a User ID and Password
- Be using ArcGIS Desktop 9.3.x or higher
The GIS Hub data reside on multiple databases. The organization of these databases reflects a combination of data type and storage costs:
| Database | 3-Tier Service Number | 2-Tier Name | Comment |
|---|---|---|---|
| GISP | 5151 | gisp_svc | Primary database, vector data |
| GISGLO | 5152 | gisglo_svc | Government Land Office surveys (GLOs) |
| GISSPEC | 5153 | gisspec_svc | Specialized and agency-specific data |
| GISRAS | 5154 | gisras_svc | Raster data |
| GISER | 5155 | giser_svc | Emergency response data |
Connecting to the GIS Hub databases can be done with a 3-Tier or a 2-Tier (a.k.a. “direct connect) connection:
3-Tier Connection
- Easiest to use, no setup required
- If a database node goes down, connection to the database will be lost, but once ArcSDE is started up on the other node (may be a time delay) AND ArcGIS Desktop is restarted, the user can resume their work
- Connection information:
- Server: ndhub.itd.nd.gov
- Service: Select one of the 3-Tier Service Numbers from the table above
- Database: <leave blank>
- Usename: Oracle User ID
- Password: Oracle password
2-Tier Connection
- Oracle 11g client installation is required (contact us for assistance)
- If a database node goes down, connection to the database will be lost but once ArcMap is restarted the user can resume their work because of automatic failover.
- Depending on network traffic, this typically provides faster performance and is recommended by Esri
- Connection information:
- Server: <leave blank>
- Service: sde:oracle11g:/;local=gisp_svc (or one of the other 2-Tier Names from the table above)
- Database: <leave blank>
- Usename: Oracle User ID
- Password: Oracle password
GIS Hub Web Services
Data on the GIS Hub is available via web services to Esri and non-Esri GIS desktop and web applications. For more information on web services and how to access them, please visit the Web Services page.
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