将经度/纬度转换为状态平面坐标 [英] Convert latitude/longitude to state plane coordinates

问题描述

我有一个具有纬度和经度的数据集，我想使用EPSG 2790(

I've got a dataset with latitude and longitude which I'd like to convert to the state plane coordinates for Illinois East, using EPSG 2790 (http://spatialreference.org/ref/epsg/2790/) or maybe ESRI 102672 (http://spatialreference.org/ref/esri/102672/).

这肯定是以前问过的；我的代码基于此处的答案(非在rgdal R程序包中的spTransform中检测到了有限转换" 和 http://r-sig-geo.2731867.n2.nabble.com/Converting-State-Plane-Coordinates-td5457204.html ).

This has definitely been asked before; my code is based on the answers here ("Non Finite Transformation Detected" in spTransform in rgdal R Package and http://r-sig-geo.2731867.n2.nabble.com/Converting-State-Plane-Coordinates-td5457204.html).

但是由于某些原因，我无法使其正常工作:

But for some reason I can't get it to work:

library(rgdal)
library(sp)
data = data.frame(long=c(41.20,40.05), lat=c(-86.14,-88.15))
coordinates(data) <- ~ long + lat
proj4string(data) <- CRS("+init=epsg:4326") # latitude/longitude
data.proj <- spTransform(data, CRS("+init=epsg:2790")) # illinois east

赠予:

non finite transformation detected:
  long    lat               
 41.20 -86.14    Inf    Inf 
Error in spTransform(data, CRS("+init=epsg:2790")) : failure in points 1
In addition: Warning message:
In spTransform(data, CRS("+init=epsg:2790")) :
  2 projected point(s) not finite

推荐答案

为数据设置coordinates时，必须在经度之前设置纬度.

When you set the coordinates for your data, you have to set the latitude before the longitude.

换句话说，更改:

coordinates(data) <- ~ long + lat

到

coordinates(data) <- ~ lat+long

它应该可以工作.

library(rgdal)
library(sp)
data = data.frame(long=c(41.20,40.05), lat=c(-86.14,-88.15))
coordinates(data) <- ~ lat+long
proj4string(data) <- CRS("+init=epsg:4326")
data.proj <- spTransform(data, CRS("+init=epsg:2790"))
data.proj

给我这个输出:

SpatialPoints:
          lat     long
[1,] 483979.0 505572.6
[2,] 315643.7 375568.0
Coordinate Reference System (CRS) arguments: +init=epsg:2790 +proj=tmerc
+lat_0=36.66666666666666 +lon_0=-88.33333333333333 +k=0.9999749999999999 +x_0=300000
+y_0=0 +ellps=GRS80 +units=m +no_defs 

这篇关于将经度/纬度转换为状态平面坐标的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！