Philadelphia County soils 2014

This data set is a digital soil survey and generally is the most
detailed level of soil geographic data developed by the National
Cooperative Soil Survey. The information was prepared by digitizing
maps, by compiling information onto a planimetric correct base
and digitizing, or by revising digitized maps using remotely
sensed and other information.

This data set consists of georeferenced digital map data and
computerized attribute data. The map data are in a soil survey area
extent format and include a detailed, field verified inventory
of soils and miscellaneous areas that normally occur in a repeatable
pattern on the landscape and that can be cartographically shown at
the scale mapped. A special soil features layer (point and line
features) is optional. This layer displays the location of features
too small to delineate at the mapping scale, but they are large
enough and contrasting enough to significantly influence use and
management. The soil map units are linked to attributes in the
National Soil Information System relational database, which gives
the proportionate extent of the component soils and their properties.

This data is hosted at, and may be downloaded or accessed from PASDA, the Pennsylvania Spatial Data Access Geospatial Data Clearinghouse http://www.pasda.psu.edu/uci/DataSummary.aspx?dataset=361

本数据集为一项数字土壤调查，通常为国家合作土壤调查所开发的土壤地理数据中最详细的一级。该信息通过数字化地图、在平面正确基线上汇编信息并进行数字化，或通过利用遥感及其他信息修订数字化地图而编制。此数据集包括地理参考的数字地图数据和计算机化属性数据。地图数据以土壤调查区域范围格式呈现，并包含对土壤及各种在景观上以可重复模式出现的杂项区域的详细、现场验证的清单。一个可选的特殊土壤特征层（点和线要素）也包含其中。该层展示了在测绘尺度下难以描绘的特征的位置，但它们足够大且对比度足够高，能够显著影响土地利用和管理。土壤图单元与国家土壤信息系统关系数据库中的属性相关联，提供了组成土壤的比例面积及其性质。数据托管于宾夕法尼亚空间数据访问（PASDA）地理空间数据仓库，并可从http://www.pasda.psu.edu/uci/DataSummary.aspx?dataset=361处下载或访问。