# Invariant spatial information in sketch maps — a study of survey sketch maps of urban areas

> Research article (Journal of Spatial Information Science, 2015) · cited 34× · AI/ML

**Wikidata**: [openalex:W2220371545](https://www.wikidata.org/wiki/openalex:W2220371545)  
**Source**: https://4ort.xyz/entity/invariant-spatial-information-in-sketch-maps-a-study-of-survey-sketch-maps-of-urban-areas