About using of retrospective geocoding for geographical search in digital libraries

1. About using of retrospective geocoding for geographical search in digital libraries Skachkov D.M., Zhizhimov O. L. Institute of Computational Technologies SB RAS

2. Relevance and prerequisites for research • The popularity of the use of geographical perspective in information systems • Lack of geographic functionality in non-geographical information systems • There is no single standard submission of geographic information in non-geographical systems • The lack of retrospective geocoding on the basis of the thesauri, anyway for Russia

3. Ways of introduction geographic information • Explicitly setting the coordinates of an object record • Link to specialized thesaurus (preferably, since this approach makes it easier to integrate into existing system)

4. Traits of binding to the thesaurus Binding using the thesaurus of geographic names can be ambiguous, since: • Geographical names depend on the time and language • Any area (path) can contain a lot of names to be included in the areas of Thus the thesaurus must meet the following requirements: • Contain information about the names and coordinates of geographical object at different times and for different languages • Contain relationships that reflect the positioning of objects • Contain references to normative documents that contain information about how changing the object's characteristics over time • Allow search not only by coordinates and names, but also by time periods

5. Existing thesauri of geographical names

6. List of requirements to the thesaurus The structure of the thesaurus must allow effectively solve following tasks: • Direct and reverse geocoding • Retrospective • Allow to include information in search technology into existing information systems Contain internal links • by geographical features • by time characteristics • by documents Thesaurus must be represented in the schema that is close to the standard schema It must have unambiguous mapping on other thesauri, in particular, it must have one-to-one mapping on the Z-Thes profile (may be extended) to integrate with existing information systems

7. Geo object Geometry representation Text representation Name Point Region . . . Document Language Document description Creation date Date of coming into effect Ontology of the thesaurus

8. Profile for accessing thesaurus For integration with existing information systems and promote interoperability, you must lock the profile access to Thesaurus (RGeoThes). Profile RGeoThes profile file should be, and must identify the ZThes: • data schema • structure recording and stencils • the mandatory and optional indexes (access points) • the syntax for search queries and search attributes • reporting formats • protocols for access to the resource

9. Record example Record { "qualifier": "8c26bc72-31b3-4cfb-bbae-6d731057bcd1", "previous": { "qualifier": ". . . " "document": { "description": ". . . " } }, "primaryName": { "name": "Агафониха", "type": "деревня", "language": "ru", "beginDocument": { "description": "unknown document" }, "endDocument": { "description": "Решение Новосибирского областного Совета депутатов №4503 от 20/09/2002.", "date": "Sep 20, 2002 " } }, "names": [ { "name": "Агафониха1", "type": "деревня", "language": "ru", "beginDocument": { "description": "unknown document" }, "endDocument": { "description": "unknown document" } } }], "locations": [{ point1: { "latitude": 54.933333, "longitude": 84.133333, }, point2: { "latitude": 55.533333, "longitude": 85.933333, }, "beginDocument": { "description": “some document…" }, "endDocument": { "description": “some document…" } }], …

10. Thank you for your attention!