Petroglyph V25 Khatm Al Melaha, Kalba, Sharjah

Natural Version, Petroglyph G22 Khatm Al Melaha, Kalba, Sharjah. A single 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 Source: Objaverse 1.0 / Sketchfab自然原貌版本：沙迦卡尔巴地区Khatm Al Melaha岩画G22号点位。画面主体为单只叙利亚野驴，年代推测为新石器时代或更早。[引自Fossati 2019年《来自过往的讯息：哈杰尔山脉岩画（阿曼）》] 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。 本次研究共记录175余块带有岩画的石刻，识别出近400个岩画纹样。每一块带有刻绘的岩石均被赋予唯一标识编号与GPS坐标。单日累计完成25455张地面拍摄照片、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测点。 本次研究借助MeshLab内置的亮度缩放（Radiance Scaling）工具、Substance Painter的材质光照编辑功能，以及Sketchfab的场景参数调整功能开展岩画识别工作。部分刻绘在常规观测视角下完全不可见，仅当通过上述任一技术可明确辨识线条时，方才进行绘图记录。 实景建模（Reality Capture） 数据来源：Objaverse 1.0 / Sketchfab