Developed WMTS URL encoding support for the OSGeo/gdal repository, focusing on improving the reliability of tile retrieval across web services. Introduced a new CPLString::URLEncode() utility in C++ and integrated it into gdalhttp.cpp to ensure that spaces and special characters in WMTS layer and tile matrix names are properly encoded. Designed and implemented comprehensive unit and integration tests to validate encoding behavior and correct URL handling, enhancing interoperability with non-standard service configurations. The work emphasized robust testing and reproducible builds, leveraging C++ and web services expertise to address potential failures in WMTS requests and streamline cross-service compatibility.