OC 1974 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><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>The 1974 Historic Orthoimagery was derived from traditional orthophotography. Images will be in raster format. Original film negatives were cleaned, scanned, and diapositives were created from these scans. The digital files were stored on DLT tape. Files were uploaded to workstations for rectification and mosaicing. ERDAS Imagine Orthobase software was used to create a seamless county wide image. Elevation data from the 1997 photography was used in this process. The original 1974 was flown of an altitude of 1&quot;=1000'.使用本网站或其中包含的内容，即表示您同意<a href="https://www.oakgov.com/open-data-terms" rel="nofollow ugc">使用条款</a>。 本1974年历史正射影像（Historic Orthoimagery）数据集源自传统正射摄影（orthophotography）技术，影像采用栅格（raster）格式存储。原始胶片底片经清洁、扫描后，由扫描结果制作得到透明正片（diapositives）。数字文件最初存储于DLT磁带中，后上传至工作站进行几何校正与影像镶嵌处理。本数据集通过ERDAS Imagine Orthobase软件制作得到覆盖全县的无缝影像，处理过程中采用了1997年摄影的高程数据。原始1974年影像的飞行拍摄比例尺为1英寸=1000英尺。