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 # <https://github.com/OSGeo/gdal/blob/trunk/.travis.yml> # # Ubuntu 14.04 Trusty Tahyr FROM ubuntu:trusty MAINTAINER Homme Zwaagstra <hrz@geodata.soton.ac.uk> # 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 /data WORKDIR /data VOLUME ["/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 -e DIR=$(dirname "$(readlink -f "$0")") GDAL_VERSION=$(cat ${DIR}/gdal-checkout.txt) export DEBIAN_FRONTEND=noninteractive # Set the locale. Required for subversion to work on the repository. update-locale LANG="C.UTF-8" dpkg-reconfigure locales . /etc/default/locale export LANG # Instell prerequisites. apt-get update -y apt-get install -y software-properties-common wget unzip subversion ccache clang-3.5 patch python-dev ant # Everything happens under here. cd /tmp # Get GDAL. svn checkout --quiet "http://svn.osgeo.org/gdal/${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.patch patch ./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 -y apt-get clean rm -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。
