You can also open any pick list in the DiversityWorkbench applications using the keyboard by pressing the function key F4, or the Alt-Cursor-Down key combination.
Hagedorn, The base DiversityGazetteer containing only the place names and the associated IDs, descriptions, etc. The base DiversityGazetteer is sufficient to record place name information, so that many users will not need the analysis data.
The analysis data have therefore been separated and are provided separately as the DiversityGazetteer Analysis Supplement. Download the compressed file for the analyis supplement and execute it it is a self-expanding archive. Open the file by double-clicking on the mdb file. A dialog box will appear that allows you to install the supplement into the DiversityGazetteer installed in the same folder. Note that although the analysis supplement has a size of approximately 58 MB compressed size ca.
The difference is due to additional space required for indices and relational foreign keys. This chapter contains technical in-depth information. It may be helpful for users who want to create customized analyses from your data. The Gazetteer itself is split into several packages that can be used together or independently.
The first two packages can be downloaded directly from the Workbench distribution site: The base DiversityGazetteer contains only a look up table for place names. The primary application is to provide pick lists of names and name ID so that geographical places can be recorded unambiguously in other databases e.
DiversityCollection or DiversityReferences. The separate analysis data component 'GazetteerAnalyzer', installable as 'AnalysisSupplement' provides additional information about each place name. Among other attributes, it contains geographical coordinates for each place name. The geographical coordinates are provided as decimal coordinates to simplify the integration of name data into most other GIS systems.
For most place names, the coordinates provided are point coordinates without any indication of the spatial extension. Thus a country like Germany will be rendered as a single point coordinate.
To reduce the complexity of the system, the 'GazetteerAnalyzer' is not truly provided as a separated module. Rather, it can be downloaded separately and is then imported into the base DiversityGazetteer see chapter ' Installing the Analysis Supplement ' for further information.
Some information that may be relevant to analysis, like place type and abbreviated hierarchy information, is also necessary to distinguish identical placenames that refer to different places homonyms. These attributes are therefore already stored in the base DiversityGazetteer. Note that both place type and hierarchy are currently stored together with place name denormalized to allow fast display together with names , but are truly tied to the place, not the name.
The analysis package also provides information about the source of a name. Most names in the DiversityGazetteer are compiled from other sources, which are documented here.
The ID that was used in the source is also provided, enabling advanced analysis using the source gazetteer itself. Thus all the complex information contained in the TGN or the German GN can be used to analyze biodiversity data that have been georeferenced with the DiversityGazetteer. For these data collections you must obtain licenses directly from the copyright holders. Institutions that have such a licence can use the SourceID provided by the analysis module to link directly into their own databases.
Alternatively, after providing proof of license, they may download the data in a pre-processed format that is compatible with the other DiversityWorkbench data formats.
The TGN database that can be provided has been converted into a fully relational database using Unicode. Information for Access users: The relationships are not modeled in the DiversityGazetteer itself. The database engine will internally create indices for foreign keys, which are not required for normal use of the DiversityGazetteer. To minimize the size of the Gazetteer, the information model has been set up using additional queries provided for this purpose.
If you view the Access relationship window, you can find the tables with only minimal relations defined on the left side, and the additional views with all relations defined on the right side.
The place name entity has been split for performance reasons into multiple regional tables, which are combined again in a union query. The place name records belonging directly to the entire world have been duplicated in each regional table. Note that queries based on union views are comparatively slow. In the analysis part of the DiversityGazetteer geographical coordinates are stored as decimal degrees in double precision IEEE bit floating-point numbers.
This can lead to a certain rounding error. Coordinate data provided by the TGN contain only minutes, no seconds; coordinates for Germany from the GN are exact to minutes and second. Most places have a considerable extension. All levels above Greece and two levels below it are visible.
You may view full records for a place by clicking on the highlighted blue name or by checking one or more checkboxes and clicking View Selected Records. For clarity of display, physical features e. To see the physical features for any level, click the hierarchy icon beside View Physical Features.
To return to the inhabited places and other administrative entities at this level, click View Political Entities. The political entities are displaying in the example above. The physical features are displaying in the example below.
You may switch the display from English to Vernacular by clicking Vernacular Display or English Display at the top right of the screen. The phrase displayed in black indicates the current view of the page Vernacular in the example below, and English, in the two examples above.
In the English display, the preferred names of places are in English; in the Vernacular display, the preferred names of places are in the vernacular or local name of the place e.
Note that many places do not have English names, and therefore appear in the vernacular local language in both displays. Some names, place types, and other information in the record are always in English. Places may have multiple hierarchical views because TGN is polyhierarchical. One parent is considered preferred , and other parents are non-preferred. When places are displaying with their non-preferred parent, an 15242 appears to the right.
In the example below, the inhabited places are displaying with their historical, non-preferred parent, Flanders. The preferred hierarchical display for each inhabited below would be with its modern nation, i. Printer-friendly version. How to Use the Search Screen Place names may include names and appellations for nations, inhabited places e.
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