[Geo-Guide Help]

Structure Map • Source Type Catalog • Subject Catalog • Local Search


Revisited! This resource was revisited and/or updated within the last four weeks.
New! A new resource added to the Geo-Guide database (usually within the last four weeks). A list of all new resources in the Geo-Guide is available.
metadata The metadata link in the so-called Mini-Templates leads to a more detailed and fielded description of the resource ("Full Metadata Template").

Evaluation: *Fair **Good ***Excellent -none (Links)

Structure Map

The structure of the Geo-Guide is displayed in the following graphic.

Schematic Overview Geo-Guide (14k)

How to use Geo-Guide:

(1) Select preferred mode of entry
There are three entry modes to access the contents of Geo-Guide database. A SOURCE TYPE catalog offers a perspective by formal criteria (e.g. to search for databases, research institutes, journals, etc.). A SUBJECT catalog provides an overview of resources by the Mathematics Subject Classification. Finally, a LOCAL SEARCH engine enables users to enter keywords (e.g. creator names, resource titles, keywords, etc.) and launch a search.

(2) Response of the system: The Mini- Templates
Depending on your preferred entry mode, the system will respond with different screens. In any case, it will present a list of results. After selecting an entry from the SOURCE TYPE or SUBJECT catalog, the results will be presented in the form of the so-called Mini-Templates with information on title, identifier and evaluation. The following example shows the Mini-Template for a very interesting database that provides access to the reviews of Zentralblatt für Mathematik:

1. Earth History Museum (Vernadsky State Geological Museum, Moscow)
Subject Class Earth History; Inter-Disciplinary: Natural History
Source Type Museums
URL http://www.sgm.ru/eng/
Contentsexcellent Clarityfair Indexexcellent Linksexcellent Metadata

(3) Select the resources which appear promising or interesting
The responses to your query are displayed in a list of Mini-Templates by alphabetical order. On the basis of this list users can select the resources that seem to be most promising or interesting. There are two options for further selection:

(3a) More detailed information on each resource
There is more detailed information on each of the resources indexed in the Geo-Guide (specifying additional metadata elements such as creator, publisher, access information, rights etc.). This information is available in the so-called full Metadata Template and is accessed via the metadata link in the lower right of each Mini-Template. This full template is meant to provide more comprehensive information on a resource without actually loading it; its categories are based on the Dublin Core Metadata Element Set.

(3b) Without a closer look at the metadata
If there is no need for a closer look at more detailed metadata, any resource is directly accessible by following the hyperlink in the identifier (URL) field of the Mini-Template.

(4) Access to a resource
No matter whether from the Mini-Template or from the full Template, any resource can directly be accessed by activating the hyperlink in the identifier field.



The Source Type Catalog organizes the entries in the Geo-Guide database according to the formal classification of the resources ("source types"). There are four main categories:

1. Information Providers/Servers
Typically, resources in this group do not contain information per se. Rather, they serve as a gateway or point of entry for further research.
2. Factual Reference Works
This section includes those resources which provide direct factual references. In contrast to the resources classified under the section above, the user will be directly lead to specific sources.
3. Bibliographic Resources
In this section, the various bibliographic sources are grouped. In contrast to the entries in other sections, the user may also be directed to linklists.
4. Primary Information Sources
This group comprises resources which feature primary information.


The Subject Catalog is meant to cover the respective subject areas that are typically to be encountered in the Earth Sciences. The catalog was structured with the overall imperative of a good overview over the field and appropriate search functionalities. In the Geo-Guide the Göttinger Online Classification (GOK) is used. All sources are indexed by English language descriptors as well as by subject classifications from subject-specific thesauri and the Dewey Decimal Classification (DDC), an internationally accepted and widely-used universal librarian classification. A third searchable classification is the Basis Classification of the Joint Library Catalog of Northern Germany Libraries (GBV - Gemeinsamer Bibliotheksverbund).
It is recommended that users take some time to familiarize themselves with the structure and contents of the Subject Catalog. This will be beneficial for better retrieval results.
A list provides a concordance between all used classification systems (GOK, BK, DDC, UDC).



The Geo-Guide is equipped with a local search engine (based on our Avanti server) that searches the database, a simple and an advanced search function are available.
Generally all searches can be truncated with a question mark (?) at the end. This will find any word starting with the stem before the "?".
The display of the search result can be chosen as:

The display can be sorted according to:

Simple Search
Search in only one category.

Text searches for the entered term in all fields containing text, e.g. author, description, clasification. It does not search in non-verbal fields like URL, date, evaluation. This search is case-insensitive, and if you enter several words, they will be concatenated with "AND".
Title performs a case-insensitive search in the Title field, several words will be concatenated with "AND".
URL separates the entered address: the server addresses at every "." and the paths at every "/". These parts are joined with "AND" and are searched in the URL field So you can enter only parts or pieces of the address. This search is case-sensitive. If you enter e.g. "emis" you will find all data sets refering to sites on the EMIS (European Mathematical Information Service) Server with the URL http://www.emis.de/.
Keywords performs a case-sensitive search in the Keyword field, several words will be regarded as one expression, e.g. "algebraic geometry" will find all entries with this keyword, while "algebraic?" will find additional entries.

Advanced Search
Combines several search options with Boolean operators and allows, for instance, for searches for an English language site containing the keyword "Hercynian Orogeny".
In Advanced Search, the following categories are additionally available:
Codes: Codes are case sensitive and have to be entered according to special tables.

Two lowercase letters, according to ISO 639-1, e.g. en for English, de for German, fr for French.
Two capital letters, according to ISO 3166, e.g. GB for Great Britain, DE for Germany, US for the United States of America.
The GOK used as subject code is given by a combination of figures and characters. For a precise entry, see the concordance list.
Source Type
Two to 7 lowercase letters as described in the Source Type Catalog.

Dates: Dates are given as 8 figures representing the year, month and day (yyyymmdd). If you use e.g. the truncation 199909?, you can find all dates from September 1999.

Last Update
This is the last time that the source was updated when it was described.
Time stamp
This is the last time the source was revisited by the Geo-Guide team.

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