对应从事遥感与地理信息的同仁来说，gdal应该是所有工具中使用频度最高的库了，那么在docker中使用gdal时，面临的第一步就是构建gdal基础镜像，社区中引用最多的就是geodata提供的gdal基础镜像包，封装的gdal最新版本是2.3.0dev。

geodata/gdal的docker在github上的地址如下：

https://github.com/geo-data/gdal-docker

根据该库的提交记录，其生成gdal镜像的方法经历了多次更新：

1 最初按照gdal官网步骤自行编译；

2 基于makefile采用make系统编译；

3 基于gdal的travel ci 脚本进行编译。

dockerfile内容如下：

### geodata/gdal## This creates an Ubuntu derived base image that installs the latest GDAL# subversion checkout compiled with a broad range of drivers.  The build process# is based on that defined in# 
     
      ## Ubuntu 14.04 Trusty TahyrFROM ubuntu:trustyMAINTAINER Homme Zwaagstra 
      
       # Install the application.ADD . /usr/local/src/gdal-docker/RUN /usr/local/src/gdal-docker/build.sh# Externally accessible data is by default put in /dataWORKDIR /dataVOLUME ["/data"]# Output version and capabilities by default.CMD gdalinfo --version && gdalinfo --formats && ogrinfo --formats
      
     

基于ubuntu:trusty基础镜像，复制镜像构建相关内容到镜像的/usr/local/src/gdal-docker目录，利用build.sh脚本执行构建操作。

build.sh内容如下：

#!/bin/sh### Install GDAL from within a docker container## This script is designed to be run from within a docker container in order to# install GDAL. It delegates to `before_install.sh` and `install.sh` which are# patched from the Travis CI configuration in the GDAL repository.#set -eDIR=$(dirname "$(readlink -f "$0")")GDAL_VERSION=$(cat ${DIR}/gdal-checkout.txt)export DEBIAN_FRONTEND=noninteractive# Set the locale. Required for subversion to work on the repository.update-locale LANG="C.UTF-8"dpkg-reconfigure locales. /etc/default/localeexport LANG# Instell prerequisites.apt-get update -yapt-get install -y \        software-properties-common \        wget \        unzip \        subversion \        ccache \        clang-3.5 \        patch \        python-dev \        ant# Everything happens under here.cd /tmp# Get GDAL.svn checkout --quiet "http://svn.osgeo.org/gdal/${GDAL_VERSION}/" /tmp/gdal/# Install GDAL.cd /tmp/gdal# Apply our build patches.patch ./gdal/ci/travis/trusty_clang/before_install.sh ${DIR}/before_install.sh.patchpatch ./gdal/ci/travis/trusty_clang/install.sh ${DIR}/install.sh.patch# Do the build.. ./gdal/ci/travis/trusty_clang/before_install.sh. ./gdal/ci/travis/trusty_clang/install.sh# Clean up.apt-get autoremove -yapt-get cleanrm -rf /var/lib/apt/lists/partial/* /tmp/* /var/tmp/*

设置GDAL_VERSION（从gdal-checkout.txt读取，为trunk，表示从svn主干分支下载源代码），下载gdal源代码到/tmp/gdal目录，下载编译器clang和python环境，对gdal的trusty_clang的travis安装脚本打补丁（通过修改后调用diff工具生成patch）,安装gdal，清理临时文件。