R mapproj lambert-azimuthal等面积投影 [英] R mapproj lambert-azimuthal equal area projection

问题描述

如何使用mapproj软件包进行Lambert-azimuthal等面积投影？
http://cran.r-project.org/web /packages/mapproj/mapproj.pdf

How can I do a lambert-azimuthal equal area projection with the mapproj package? http://cran.r-project.org/web/packages/mapproj/mapproj.pdf

有

azequalarea（）等面积

azequalarea() equal-area

和

lambert（lat0，lat1）保形，在lat0和lat1上的真实比例

lambert(lat0,lat1) conformal, true scale on lat0 and lat1

什么是关闭到lambert-azimuthal等于投影？

What one is closests to lambert-azimuthal equal area projection?

推荐答案

在包 mapproj 中，函数 mapproject（），似乎Lambert-azimuthal等面积投影将是 azequalarea（），因为 lambert （lat0，lat1）是Lambert Conformal Conic投影（因为它在code中的手册中列出了关于Prime Meridian对称的极地圆锥投影）

In package mapproj, and the function mapproject(), it seems that the Lambert-azimuthal equal area projection would be azequalarea() since lambert(lat0,lat1) is the Lambert Conformal Conic projection (since it is listed in the manual in the Polar conic projections symmetric about the Prime Meridian).

在包 GEOmap 中，投影是使用函数 lamaz .eqarea（）。

In package GEOmap, the projection is done using function lamaz.eqarea().

在包 rgdal 中，功能 spTransform（）包含一个以 + proj = laea 开头的proj4字符串。

In package rgdal, it is done with a call to function spTransform() containing a proj4 string starting with +proj=laea.

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