30. 文献和网络参考

GDAL-SOFTWARE-SUITE. 地理空间数据抽象库. https://gdal.org, 2013.

GRASS-PROJECT. 地理资源分析支持系统. https://grass.osgeo.org, 2013.

NETELER, M., AND MITASOVA, H. 开源GIS: A grass gis approach, 2008.

OGR-SOFTWARE-SUITE. 地理空间数据抽象库. https://gdal.org, 2013.

OPEN-GEOSPATIAL-CONSORTIUM. Web map service (1.1.1) implementation specification. https://portal.ogc.org/files/?artifact_id=1081&version=1&format=pdf, 2002.

OPEN-GEOSPATIAL-CONSORTIUM. Web map service (1.3.0) implementation specification. https://portal.ogc.org/files/?artifact_id=14416&format=pdf, 2004.

POSTGIS-PROJECT. Spatial support for postgresql. http://www.refractions.net/products/postgis/, 2013.