Petroglyph J13 Khatm Al Melaha, Kalba, Sharjah

Natural Version with Paint, Petroglyph J13 Khatm Al Melaha, Kalba, Sharjah. Anthropomorphic figures, sun symbol, wavy lines. 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含彩绘的岩刻遗存：阿联酋沙迦市卡尔巴辖区哈特姆·阿勒梅拉哈（Khatm Al Melaha）的J13号岩刻。该遗存包含拟人形象、太阳符号与波浪线条，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：阿曼哈杰尔山脉岩画》] 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画遗址之一。 本次调研共记录175余块带有岩刻的石材，辨识出近400个岩绘母题。每一块带有刻绘的岩石均被赋予唯一标识编号与GPS坐标。单日采集共计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测点。 岩刻的识别借助了MeshLab中的辐射缩放（Radiance Scaling）功能、Substance Painter的材质光照模拟方案，以及Sketchfab的环境参数调整工具。部分刻绘在常规视角下完全不可见，仅当通过上述任一技术可清晰辨识刻线时，才会进行绘图记录。 数据处理采用Reality Capture与Substance Painter 数据来源：Objaverse 1.0 / Sketchfab