Prior to version 10.1.2, all the spatial data rendered by MapViewer had to be in the same spatial reference system (SRS). If your data comes from different sources and they use different SRS's, you had to explicitly use Oracle Spatial's coordinate system functions to transform them into a single reference system for viewing purposes. Starting with 10.1.2, MapViewer can now perform on-the-fly projection of your spatial data. To enable this, you must specify a master srid in your map request.

Yes, support for Oracle workspace manager (WM) is added in MapViewer 10.1.2. For any theme (predefined or dynamic) whose base table is version enabled, you can view its latest modifications in any workspace (and save point within that workspace) by specifying the workspace name (and optionally the savepoint) for the theme. For instance, here is a map request with a dynamic theme that shows the spatial data in a workspace named "ws_1". <map_request ..

Go to the MapViewer home page, click on the demos link, then choose the jview.jsp demo. This is a simple utility that you can use to quickly view any spatial data stored in the database or created through Oracle Spatial's functions (such as the result of an sdo_buffer operation). In the jview.jsp page, fill in a datasource name that you already defined, and then simply type a SQL query that will select the table's geometries in the text area named "query 1".

No, but it can use map images from a Webmap Server. MapViewer 10.1.2 supports a new theme type called WMS-Theme, which can be used to import a map layer generated by any 3rd party's OGC WMS 1.1 compliant server. Here is a sample XML map request for MapViewer that includes a WMS theme. Note you can also add WMS themes through the Java API. Note the parameters specified in the WMS theme are for illustration only. <?xml version="1.

Prior to version 10.1.2, the only way to view spatial data stored in a user B's schema from user A is by granting select permission on B's tables to A, then create views in schema A, and populate its user_sdo_geom_metadata with metadata for those views. You can then create themes for these views and display them from MapViewer. Starting with version 10.1.2, you have two more options.

Data used with geographic information technology have different characteristics than data required in conventional data base systems. GIS uses spatial data which, quite simply, includes anything that takes up geographic space or has geographic distribution.

Yes. CubicNavigator can also render equirectangular, cylindrical and standard rectilinear panoramas, as well as horizontally or vertically stacked cubic images. A projection is simply a means of changing a view from one form to another. For example, if you found a globe of the world, unwrapped the paper strips of the map from its surface and spread them out on the floor, you would have projected a spherical image (from the globe) onto a rectangular image (the floor).

Geo-spatial data is a term used to cover any data with geographic references, for example, Ordnance Survey national grid references, postal addresses, place names or the names of administrative areas.

Yes. When defining a theme that is based on a view, you will first need to register the view's geometry column in user_sdo_geom_metadata. Use the view name as the table_name value when inserting into user_sdo_geom_metadata. If your view is a join view (based on more than one base tables), you must also manually modify the theme's styling_rules to specify a key_column attribute. This attribute tells MapViewer the name of the column in the view that can serve as the id column for the geometries.

The NJEDL's partnership with the NJDEP requires that spatial (GIS) data is cataloged on the NJ Spatial Data Clearinghouse, which was designed in coordination with the Federal Geographic Data Committee (FGDC). This is intended to provide a clearinghouse for spatial data, or GIS compatible data. A data set is considered to be "spatial" if it has spatial coordinates, such as latitude and longitude, or an x,y Cartesian coordinate system.

In order to download data you will first have to register. If you have already registered, you can get data by accessing the Main Catalog page. Once you have registered and verified your registration via the email sent to you, the data will be accessible for download. What should I do if I see incorrect information on here? Send us an e-mail at ccmap@doit.cccounty.us, with a description of the problem area. Try to provide enough information for us to investigate the area.

Yes. Simply add your data source definition in the mapViewerConfig.xml. Make sure you prefix your database user's password with "!", so that MapViewer will obfuscate the cleartext password when it reads in the data source definition for the first time. Here is an example datasource definition placed in mapViewerConfig.xml. <map_data_source name="mvdemo"

MapViewer is a rendering service for geospatial data managed in Oracle Spatial. It is a component of the Oracle Application Server, and first shipped with the 9.0.2 version of 9iAS. MapViewer is a pure Java component written for the Oracle Container for J2EE (OC4J), although it can also be deployed to other J2EE containers such as JBoss.

On Linux or Unix systems, if you have installed Java JDK 1.4, then you can take advantage of its -Djava.awt.headless=true option to start OC4J without an X11 server running or the DISPLAY environment variable set. Here is an example of how to start up a standalone version of OC4J which contains MapViewer: sh> java -Djava.awt.headless=true -jar oc4j.jar In terms of functionality, there is no difference. However, the packaging is different. The mapviewer.

Yes. For instance, you can query geometries with a function-based index and display them by defining a dynamic JDBC theme.

That solution will not work if you are using MapViewer version 9.0.4 or earlier. You can, however, employ the following partial solution. MapViewer lets you specify an arbitrary URL to a background image, through the bgimage attribute of a map request. Construct a valid GetMap request to a WMS server, and use it as the value of the bgimage attribute. MapViewer will then display the result map as its background.

Yes. When defining a new data source, you can use the container_ds attribute instead of specifying detailed connection information through jdbc_host/jdbc_sid/jdbc_port/jdbc_user/jdbc_password/jdbc_mode. The value for the container_ds attribute should be the same as that of the ejb-location in your container's data source definition.

First of all, make sure you read and keep copies of metadata for each datafile you'll be using, to keep track of information such as projection, publication date, source, etc. Another resource that may help you determine the projection of your data is the Projection_checker. The Projection checker is a set of Washington State themes (boundary, hydro, and transportation) from USGS which are in geographic, State Plane (N & S, in feet), and UTM (Zone 10 in meters); NAD27 and NAD83.