Impervious Surface 1995

The Impervious Surface - 1995 layer contains polygon features generated from the 1995 through 1998 Digital Aerial Survey mapping line work. The use of multiple years of DAS updates best reflects the impervious layer as it was in 1995.The Impervious Surface layer features represent the various impervious surface types found within The City of Calgary. These features are classified by surface type and description based on the classifications and specifications used in the Digital Aerial Survey Program. Additional higher level general surface type classification and referencing to the Alberta Township System (ATS) has been applied to each impervious surface layer feature. To learn more about other DAS products available, visit <a href="https://www.calgary.ca/cs/iis/mapping-products/digital-aerial-survey.html">Digital Aerial Survey</a>.

该不可渗透地表 - 1995层包含了由1995年至1998年数字航空摄影测量线工作生成的多边形要素。利用多年度的数字航空摄影测量（DAS）更新，最佳地反映了1995年的不可渗透层状态。不可渗透地表层要素代表了卡尔加里市内发现的多种不可渗透地表类型。这些要素根据数字航空摄影测量程序中使用的分类和规范进行表面类型和描述的分类。此外，对每个不可渗透地表层要素应用了更高层次的通用表面类型分类，并参照了阿尔伯塔土地测量系统（ATS）。欲了解更多关于其他DAS产品的信息，请访问<a href="https://www.calgary.ca/cs/iis/mapping-products/digital-aerial-survey.html">数字航空摄影测量</a>。