Utilizing UAV-based photogrammetry to develop a 3D Model of IITGN

At Indian Institute of Gandhinagar (IITGN), Gujarat, India, a half semester 2 credit course was taught on drone data acquisition, processing, and interpretation during March-April 2024. The class project was to collect drone imagery of the entire IITGN campus, approximately 1.96 km2 in area. This dataset has been collected and processed by the 28 students who enrolled in the class. The survey was conducted with a Quadcopter equipped with a 48 MPX camera. During the data acquisition, a total of >4,100 photographs with 70% overlap were collected with an average altitude of 105m. The aerial imagery was stitched utilizing the Structure from Motion (SfM) technique (Agisoft) to develop the 3D Digital Outcrop Model (DOM). Six individual models were developed for the entire IITGN campus that has been stitched into a single model. The final IITGN 3D model has a ground resolution of 2.21 cm/pix. Ground control points (GCPs) were collected before the survey that has been utilized to georeference the model. This dataset provides an orthophotograph (5.2 cm/pix) as well as a 3D model (.bin) of the entire IITGN campus.

在印度甘地纳加尔印度理工学院（IITGN），古吉拉特邦，印度，于2024年3月至4月期间开设了一门半学期、2学分课程，旨在教授无人机数据采集、处理及解读。课程项目要求收集整个IITGN校园的无人机影像，该校园面积约为1.96平方公里。该数据集由28名选修该课程的学生进行收集与处理。调查采用配备48兆像素相机的四旋翼无人机进行。在数据采集过程中，共收集了超过4,100张照片，重叠率为70%，平均飞行高度为105米。利用结构从运动（SfM）技术（Agisoft）将航空影像拼接，以构建3D数字露头模型（DOM）。针对整个IITGN校园，共开发了六个独立模型，并将它们拼接成一个单一模型。最终的IITGN 3D模型地面分辨率为2.21厘米/像素。在调查前收集了地面控制点（GCPs），用于模型的地理参照。该数据集提供了整个IITGN校园的正射影像（5.2厘米/像素）以及3D模型（.bin格式）。