{"title":"查询用RDF表示的地理空间数据","authors":"D. Pantazi, D. Bilidas","doi":"10.1145/3581906.3581914","DOIUrl":null,"url":null,"abstract":"In this chapter, we will show how to query geospatial data expressed in RDF using the query languages GeoSPARQL, stSPARQL, GeoSPARQL+, and GeoSPARQL 1.1. The queries will be posed on the datasets of Chapter 6 and can be run on the demo available on the SPARQL endpoint that can be found at the Web site of the book. Since GeoSPARQL, stSPARQL, and GeoSPARQL+ simply add spatial extension functions to SPARQL, all SPARQL queries are expressible in these languages as well. For example, we can write the following query. Query 1: Give me the population of the municipality of Piraeus (“Πειραιάς” in Greek). This query can be expressed as follows:","PeriodicalId":433742,"journal":{"name":"Geospatial Data Science","volume":"42 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2023-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Querying Geospatial Data Expressed in RDF\",\"authors\":\"D. Pantazi, D. Bilidas\",\"doi\":\"10.1145/3581906.3581914\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"In this chapter, we will show how to query geospatial data expressed in RDF using the query languages GeoSPARQL, stSPARQL, GeoSPARQL+, and GeoSPARQL 1.1. The queries will be posed on the datasets of Chapter 6 and can be run on the demo available on the SPARQL endpoint that can be found at the Web site of the book. Since GeoSPARQL, stSPARQL, and GeoSPARQL+ simply add spatial extension functions to SPARQL, all SPARQL queries are expressible in these languages as well. For example, we can write the following query. Query 1: Give me the population of the municipality of Piraeus (“Πειραιάς” in Greek). This query can be expressed as follows:\",\"PeriodicalId\":433742,\"journal\":{\"name\":\"Geospatial Data Science\",\"volume\":\"42 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2023-06-09\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Geospatial Data Science\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1145/3581906.3581914\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Geospatial Data Science","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1145/3581906.3581914","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
In this chapter, we will show how to query geospatial data expressed in RDF using the query languages GeoSPARQL, stSPARQL, GeoSPARQL+, and GeoSPARQL 1.1. The queries will be posed on the datasets of Chapter 6 and can be run on the demo available on the SPARQL endpoint that can be found at the Web site of the book. Since GeoSPARQL, stSPARQL, and GeoSPARQL+ simply add spatial extension functions to SPARQL, all SPARQL queries are expressible in these languages as well. For example, we can write the following query. Query 1: Give me the population of the municipality of Piraeus (“Πειραιάς” in Greek). This query can be expressed as follows:
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