文章分类 -  GIS / Theory

Geographically Weighted Regression
摘要：1 Kernel Functions Used in GWR Definitions \(d_{ij}\) : 位置 \(i\) 到位置 \(j\) 的距离 \(w_{ij}\) : \(b\) : a parameter describing bandwidth 1.1 Fixed Kernel 阅读全文
posted @ 2023-08-08 13:42 veager 阅读(79) 评论(0) 推荐(0)
Spatial Regression
摘要：Spatial Regression 1. Motivation Spatial Heterogeneity: means that parts of the model may vary systematically with geography, change in different plac 阅读全文
posted @ 2023-05-14 13:30 veager 阅读(108) 评论(0) 推荐(0)
Spatial Autocorrelation
摘要：# Spatial Autocorrelation > Tobler's First Law of Geography: > > Everything is usually related to all else but those which are near to each other are 阅读全文
posted @ 2023-05-13 20:09 veager 阅读(98) 评论(0) 推荐(0)
Spatial Weights
摘要：Spatial Weights 空间矩阵 Spatial Weights, site 1. 概念 空间权重矩阵（Spatial Weight）: \([w_{ij}]\) 用于描述（地理）空间中位置之间的的邻近关系或相似性（similarity） 二元矩阵：\(w_{ij}=1\) 表示位置 \(i 阅读全文
posted @ 2023-05-13 20:04 veager 阅读(302) 评论(0) 推荐(0)
Geospatial interpolation 差值
摘要：空间差值法的用途 1. kernel density estimation (Heatmap) 2. IDW Interpolation 2.1 计算公式 Inverse Distance Weighting (IDW) Interpolation $$ x_j = \frac{\sum_{i=1} 阅读全文
posted @ 2023-04-24 07:22 veager 阅读(73) 评论(0) 推荐(0)
Geometry 常用工具
摘要：Geometry 常用工具 常用库 shapely GeoPandas scikit-geometry Voronoi Diagram Delaunay Triangulation 1. Polygon Skeleton 原理：Li et al. (2014) Section 2.1 Constra 阅读全文
posted @ 2022-11-20 14:49 veager 阅读(279) 评论(0) 推荐(0)
Spatial Analysis
摘要：Spatial Analysis http://documentation.sas.com/doc/en/etscdc/14.2/etsug/etsug_spatialreg_details.htm 阅读全文
posted @ 2022-11-14 00:06 veager 阅读(27) 评论(0) 推荐(0)
QGIS - Network Analysis
摘要：QGIS - Network Analysis 1. ORS Tool 插件 基本信息 官网：地址 需要申请 API Key 有请求限制 功能（基于实际路网） 最短路 最短时间路 等时线（isochrone） 阅读全文
posted @ 2022-03-12 07:45 veager 阅读(135) 评论(0) 推荐(0)
Geography - Map Projections
摘要：Geography - Map Projections 0. 有用的网站 [1] I Hate Coordinate Systems!, 地址 [2] EPSG, 地址 [3] The True Size of, 地址 1 Coordinate Reference System (CRS) Coor 阅读全文
posted @ 2022-02-27 12:06 veager 阅读(178) 评论(0) 推荐(0)