OC 2002 TC Ortho Image Service

<div>BY USING THIS WEBSITE OR THE CONTENT THEREIN, YOU AGREE TO THE <u><a href='https://www.oakgov.com/open-data-terms' rel='nofollow ugc'>TERMS OF USE</a></u><span style='font-family:&quot;Avenir Next W01&quot;, &quot;Avenir Next W00&quot;, &quot;Avenir Next&quot;, Avenir, &quot;Helvetica Neue&quot;, Helvetica, Arial, sans-serif; font-size:17px;'>. </span><br /></div><div><span style='font-family:&quot;Avenir Next W01&quot;, &quot;Avenir Next W00&quot;, &quot;Avenir Next&quot;, Avenir, &quot;Helvetica Neue&quot;, Helvetica, Arial, sans-serif; font-size:17px;'><br /></span></div>An orthoimage is remotely sensed image data in which displacement of features in the image caused by terrain relief and sensor orientation have been mathematically removed. Orthoimagery combines the image characteristics of a photograph with the geometric qualities of a map. For this dataset, the natural color orthoimages were produced at 0.3-meter pixel resolution (approximately 1-foot). The design accuracy is estimated not to exceed 3-meter diagonal RMSE (2.12m RMSE in X or Y). Each orthoimage provides imagery for a 1500- by 1500-meter block on the ground. The projected coordinate system is UTM with a NAD83 datum. There is no image overlap been adjacent files. The naming convention is based on the U.S. National Grid (USNG), taking the coordinates of the SW corner of the orthoimage.

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正射影像（orthoimage）是指通过数学校正手段消除了地形起伏与传感器姿态引发的影像特征位移的遥感影像数据。正射影像兼具照片的影像表现力与地图的几何精度特性。本数据集的天然彩色正射影像采用0.3米的像素分辨率（约1英尺）。其设计精度估算的对角线均方根误差（RMSE）不超过3米（X或Y方向的均方根误差为2.12米）。每张正射影像对应地面上1500×1500米的区块。该数据集采用通用横轴墨卡托（UTM）投影坐标系，基准为北美大地基准1983（NAD83）。相邻影像文件之间不存在重叠。其命名规范基于美国国家网格（USNG），以正射影像西南角的坐标作为命名依据。