Petroglyph V27 Khatm Al Melaha, Kalba, Sharjah

Natural Version, Petroglyph V27 Khatm Al Melaha, Kalba, Sharjah. Poorly defined symbol. 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自然版本，V27号岩刻（Petroglyph），位于阿联酋沙迦卡尔巴的哈特姆·阿勒·梅拉哈（Khatm Al Melaha）遗址。该符号辨识模糊，年代推测为新石器时代或更早。[引自Fossati 2019年《来自往昔的讯息：哈杰尔山脉（阿曼）岩画艺术》] 哈特姆·阿勒·梅拉哈是阿联酋沙迦卡尔巴附近阿曼海沿岸的考古遗址，亦是阿联酋境内规模最大的岩刻艺术遗址之一。 本次调查已记录超过175块带有岩刻的石块，识别出近400个纹饰单元。每一块带有刻痕的岩石均被赋予唯一标识编号与GPS（全球定位系统）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±1cm的GPS测点。 本次岩刻识别借助MeshLab中的辐射度缩放（Radiance Scaling）、Substance Painter中的材质光照调节，以及Sketchfab中的场景条件调整技术。部分刻痕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刻线时，才会进行纹饰绘制。 实景捕捉（Reality Capture） 数据来源：Objaverse 1.0 / Sketchfab