non-spatial data structure—hierarchical, networking and relationalDifferent sources of spatial and non-spatial databases Types of GIS database—spatial and non-spatial Representation of spatial features of the Earth's surface by vector and raster data structures (point, line and Polygon) Advantages ...
spatial cognition 空间认知 spatial data 空间数据 Spatial Data Transfer Standard 空间数据传输标准 spatial database 空间数据库 spatial join 空间结合 spatial modeling 空间建模 spatial overlay 空间叠加 spatial query 空间查询 spatial reference 空间参考 spatial weights matrix 空间权重矩阵 spatialization 空间化 spe...
Support for SpatiaLite is relatively limited and most software that supports SpatiaLite also supportsGeoPackageas well. They build on top of the same underlying technology, SQLite. SpatialLite lacks the support for extensions or raster data present in GeoPackage. While these are not necessarily must-...
Many NGOs, local governments, smart cities and city agencies have enabled the public to access spatial and nonspatial information through GIS. With the right technology and initiative, sharing information on assets and resources with City Map Portals can improve city management, enable collaboration ...
In this module, you will learn more about attribute data, the descriptive, non-spatial data that enables us to symbolize and label the spatial data. You will learn about various types of attributes, data types, how to query based on attributes, how to organize data, and databases....
A spatial data structure integrating gis and simulation in a marine environment. Marine Geodesy 18, 213-228.Gold C M,Condal A R. A spatial data structure integrating GIS and simulation in a marine environment [J]. Marine Geodesy, 1995,18: 213....
National Spatial Data Infrastructure 美国国家空间数据基础设施 natural breaks classification 自然分类 navigation 导航 Navstar Navstar (美国国防部全球定位系统联合服务项目) neighborhood statistics 邻域统计 networked 联网 node 节点 noncoterminous polygon 非相连多边形 nonversioned 非版本 normal...
string (str) -- string that contains spatial data srid (int) -- spatial reference identifier 返回类型: a GEOSGeometry corresponding to the spatial data in the string fromstr(string, srid) is equivalent to GEOSGeometry(string, srid).举例...
1. Get the data This loader currently supports data in Shapefiles, MID/MIF, and KML (godsforbid). Once you've found the spatial data from the relevant electoral commission simply: Zip up the data (the data files themselves - not the folder they're in) ...
Def:(spatial relationship between features) (remaininvariant under certain transformationsuch as bending or stretching) 2 types of vector: Spaghetti data model & graph-based data model Spaghetti data model 3 part: point, line, polygon Characteristic: 1. nontopology 2. easy to state cannot to anal...