Petroglyph N12 Khatm Al Melaha, Kalba, Sharjah

Natural Version with paint, Petroglyph N12 Khatm Al Melaha, Kalba, Sharjah. One Syrian Wild Ass. Likely Neolithic or earlier. [Fossati 2019 Messages from the Past: Rock Art of the Al-Hajar Mountains (Oman)]. Khatm Al Melaha is an archaeological site on the coast of the Oman Sea near Kalba in Sharjah, UAE. It is one of the largest rock art sites in the UAE. Over 175 stones with petroglyphs were documented and close to 400 motifs were identified. Every rock with a glyph was given an ID number and a GPS coordinate. In total 25455 terrestrial photographs, 5244 drone photographs, 44 drone videos, and 182 GPS points (+/- 1cm) were done in a single day. Petroglyphs were identified using Radiance Scaling in Meshlab, materials lighting in Substance Painter, and by changing conditions in Sketchfab. Some carvings were completely invisible when viewing. Drawings were done only when a line could be identified using one of these techniques. Reality Capture and Substance Painter Source: Objaverse 1.0 / Sketchfab彩绘自然遗存：阿联酋沙迦卡尔巴的哈特姆·阿尔·梅拉哈（Khatm Al Melaha）N12号岩画（petroglyph）。该岩画描绘一头叙利亚野驴，年代推测为新石器时代或更早。[引自Fossati 2019年《来自过去的讯息：哈杰尔山脉（阿曼）岩画》] 哈特姆·阿尔·梅拉哈（Khatm Al Melaha）是坐落于阿联酋沙迦卡尔巴附近阿曼海沿岸的考古遗址，同时也是阿联酋境内规模最大的岩画遗址之一。 本次调查共记录超过175块带有岩画的石块，识别出近400个岩画纹样。每一块带有雕刻的岩石均被分配唯一ID编号与GPS坐标。单日累计完成25455张地面摄影照片、5244张无人机航拍照片、44段无人机航拍视频，以及182个精度达±1厘米的GPS测量点。 岩画识别借助MeshLab中的辐射度缩放（Radiance Scaling）工具、Substance Painter的材质光照调节功能，以及Sketchfab的场景参数调整功能实现。部分岩刻在常规视角下完全不可见，仅当通过上述任一技术可识别出线条时，才会开展纹样绘制工作。 数据处理工具：Reality Capture与Substance Painter 数据来源：Objaverse 1.0 / Sketchfab