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GDAL support for additional map formats

!!!!!!!WORK IN PROGRESS Compiling and Building QMapShack for Windows / VS2107 WORK IN PROGRESS!!!!!!!

If you need GDAL support for the WCS, WMS, WMTS, MBTiles formats, then you need to compile GDAL with zlib, cURL and sqlite.

The following instructions show how to provide these dependencies.

Finally don't forget to activate the usage of those libraries in the nmake.opt from GDAL before compiling GDAL.

download https://zlib.net/zlib1211.zip
Read zlib-1.2.11\contrib\vstudio\readme.txt
Build instructions for Visual Studio 2015 (32 bits or 64-bits)
- Decompress current zlib, including all contrib/* files
- Open contrib\vstudio\vc14\zlibvc.sln with Microsoft Visual C++ 2015
as zlib-1.2.11 does not provide a .sln file for VS1017, we have to take the one for VS2015:
just let VS2017 convert the sln configuration
build the zlibvc project (Release, x64)
create a directory M:\lib2017\zlib
create a subdirectory bin where you store the zlibwapi.dll created during build
create a subdirectory include where you copy all the *.h files from the source
create a subdirectory lib where you store the zlibwapi.lib created during build

from https://curl.haxx.se/download.html download the latest source, e.g. curl-7.61.0.zip
read https://curl.haxx.se/docs/install.html how to install curl and libcurl
read curl-7.61.0\winbuild\BUILD.WINDOWS.txt
consider to provide zlib as dependency as described in that file
Open the VS2017 x64 command prompt, navigate to the curl-7.61.0\winbuild directory

  nmake /f Makefile.vc mode=dll 
  nmake /f Makefile.vc mode=dll WITH_DEVEL=M:\lib2017\curl_deps WITH_ZLIB=dll

from curl-7.61.0\builds\libcurl-vc-x64-release-dll-zlib-dll-ipv6-sspi-schannel, copy the 3 sub-directories to M:\lib2017\cURL

Here we are lazy and don't compile https://dcravey.wordpress.com/2011/03/21/using-sqlite-in-a-visual-c-application/
Download the native SQLite DLL from: https://www.sqlite.org/2019/sqlite-dll-win64-x64-3270200.zip
Create a directory M:\lib2017\sqlite
Unzip the DLL and DEF files to that directory
Open a “Visual Studio Command Prompt (2017)” and navigate to your source folder.
Create an import library using the following commandline:

LIB /DEF:sqlite3.def

To build PROJ.4 version 6, you need also the sqlite executables. See PROJ.4 Installation instructions

Download https://www.sqlite.org/2019/sqlite-tools-win32-x86-3270200.zip
Unzip the EXE files to the same directory where you placed the DLL and DEF files