OC 1940 BW 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><br /></div>The 1940 Historic Orthoimagery was derived from traditional orthophotography taken of Oakland County, Michigan. Original film negatives were cleaned, scanned, and raster digital files were created as TIF images. It is not known how the orthorectification, conversion or reprojection processes took place. This mosaic was created from a series of tiles stored in ERDAS Imagine format (IMG) in a Michigan State Plane South NAD83 International Feet projected coordinate system. Some tiles were missing from the IMG files used to create this mosaic, and one tile (XR-1A-109) did not have its respective world file. Therefore, some small gaps are present within the final dataset. The initial scale of the orthophotography is not known.<div>使用本网站或其中的内容，即表示您同意<a href="https://www.oakgov.com/open-data-terms" rel="nofollow ugc">使用条款</a><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><br /></div>1940年历史正射影像（Historic Orthoimagery）源自美国密歇根州奥克兰县拍摄的传统正射摄影影像。原始胶片底片经清洁、扫描处理后，生成了TIF格式的栅格数字文件。目前暂不可考该数据集的正射校正、格式转换及重投影流程的具体实施细节。本影像镶嵌图由一系列瓦片数据拼接生成，这些瓦片以ERDAS Imagine（IMG）格式存储，采用密歇根州南平面投影坐标系，大地基准为北美大地基准1983（NAD83），单位为国际英尺。用于拼接生成该镶嵌图的IMG格式文件存在部分瓦片缺失，且编号为XR-1A-109的瓦片未配备对应的世界文件（world file）。因此，最终生成的数据集中存在少量空白区域。该原始正射摄影影像的初始比例尺暂不可考。