Spatial

I want to calculate the distance between approx. 100,000 different ZIP codes. I know about the mapdist function in the ggmap package mapdist works perfectly: library(ggmap) mapdist('Washington', 'New York', mode = 'driving') # from to m km miles seconds minutes hours # 1 Washington New York 366284 366.284 227.6089 13997 233.2833 3.888056 mapdist('20001', '10001', mode = 'driving') # from to m km miles seconds minutes hours # 1 20001 10001 363119 363.119 225.6421 13713 228.55 3.809167 However, mapdist relies on the Google Geocoding API which is subject to a query limit of 2,500 geolocation

Does anyone know (ideally, with a reference), whether the VS2010 release of LinqToSQL or EntityFramework v4 will support queries over the SQL 2008 spatial data types? In EF 4.0 you might be able to hack something together using a combination of custom functions and pretending the spatial types are really Binary types. This is something that I am thinking of mucking around with and trying out and adding to my tips series . But as yet even the hack is unproven. :( And as for direct support, unfortunately neither L2S or EF v4 will support spatial types in the VS2010 timeframe. Alex James Entity

Has any of you had any experience with using NoSQL (non-relational) databases to store spatial data? Are there any potential benefits (speed, space, ...) of using such databases to hold data for, say, a desktop application (compared to using SpatiaLite or PostGIS)? I've seen posts about using MongoDB for spatial data , but I'm interested in some performance comparison. Peter Neubauer graphs databases like Neo4j are a very good fit, especially as you can add different indexing schemes dynamically as you go. Typical stuff you can do on your base data is of course 1D indexing (e.g. Timline or B

Hibernate 的功能被拆分成一系列的模块/包（modules/artifacts），其目的是为了对依赖进行独立（模块化）。 模块名称 说明 hibernate-core 这个是 Hibernate 的主要（main (core)）模块。定义了 ORM 的特性和 API 以及一系列整合的 SPIs。 hibernate-envers Hibernate 历史的实体版本特性 hibernate-spatial Hibernate 的 Spatial/GIS 数据类型支持 hibernate-osgi Hibernate 支持运行 OSGi 容器 hibernate-agroal 整合 Agroal 连接池库到 Hibernate hibernate-c3p0 整合 C3P0 连接池库到 Hibernate hibernate-hikaricp 整合 HikariCP 连接池库到 Hibernate hibernate-vibur 整合 Vibur DBCP 连接池库到 Hibernate hibernate-proxool 整合 Proxool 连接池库到 Hibernate hibernate-jcache 整合 JCache 缓存特性到 Hibernate，使任何与其兼容的缓存实现能够成为 Hibernate 二级缓存的提供者 hibernate-ehcache 整合

I am trying to convert geographic coordinates (degrees) into UTM coordinates (meters) and keep getting an error message that a "Non finite transformation detected." Do you know how I can fix this? Here is the code I used: > GPS.Points <- Gomer.Data[, c('Longitude', 'Latitude')] > head(GPS.Points) Longitude Latitude 1 23.85474 -19.52211 2 23.85531 -19.52243 3 23.85534 -19.52257 4 23.85580 -19.52346 5 23.85551 -19.52380 6 23.85513 -19.52360 > GPS.Points.Spatial.Data <- SpatialPoints(GPS.Points, proj4string=CRS("+proj=longlat +ellps=WGS84")) > GPS.Points.Spatial.Data[1] SpatialPoints: Longitude

I have made a reference grid, cells 50x50m, based on GPS locations of a collared animal. I want to do the equivalent to a spatial join in ArcGIS, and count the number of points in each cell. I have made a reference grid, using a SpatialPointsDataFrame object (the data frame is already projected, using UTM coordinate system) RESO <- 50 # grid resolution (m) BUFF <- 500 # grid extent (m) (buffer around location extremes) XMIN <- RESO*(round(((min(dat.spdf$Longitude)-BUFF)/RESO),0)) YMIN <- RESO*(round(((min(dat.spdf$Latitude)-BUFF)/RESO),0)) XMAX <- XMIN+RESO*(round(((max(dat.spdf$Longitude)