Petroglyph G22, Khatm al Melaha, Sharjah

Natural Version, Petroglyph G22 Khatm Al Melaha, Kalba, Sharjah. Several poorly defined anilmals and designs. 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 DStretch Source: Objaverse 1.0 / Sketchfab自然版本：阿联酋沙迦卡尔巴的哈塔姆·阿尔·梅拉哈（Khatm Al Melaha）G22号岩画点。存在若干轮廓模糊的动物与纹饰图案，年代大概率属于新石器时代或更早。[Fossati 2019 《来自往昔的讯息：哈杰尔山脉（阿曼）岩画艺术》] 哈塔姆·阿尔·梅拉哈（Khatm Al Melaha）是位于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画遗址之一。 该遗址已记录超过175块带有岩画（petroglyph）的石块，并识别出近400个纹饰。每一块带有刻痕的岩石均被分配唯一编号与GPS坐标。本次调研单日累计完成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。 本次岩画识别采用了MeshLab中的辐射缩放（Radiance Scaling）工具、Substance Painter的材质光照功能，以及Sketchfab的场景条件调整功能。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，才会进行绘图记录。 实景捕捉（Reality Capture）与DStretch 数据集来源：Objaverse 1.0 / Sketchfab