Soil Types

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 (SSURGO). 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. The map units delineated on the detailed soil maps in a soil survey represent the soils or miscellaneous areas in the survey area. The map unit descriptions in this report, along with the maps, can be used to determine the composition and properties of a unit. A map unit delineation on a soil map represents an area dominated by one or more major kinds of soil or miscellaneous areas. A map unit is identified and named according to the taxonomic classification of the dominant soils. Within a taxonomic class there are precisely defined limits for the properties of the soils. On the landscape, however, the soils are natural phenomena, and they have the characteristic variability of all natural phenomena. Thus, the range of some observed properties may extend beyond the limits defined for a taxonomic class. Areas of soils of a single taxonomic class rarely, if ever, can be mapped without including areas of other taxonomic classes. Consequently, every map unit is made up of the soils or miscellaneous areas for which it is named and some minor components that belong to taxonomic classes other than those of the major soils. The Map Unit Description (Brief, Generated) report displays a generated description of the major soils that occur in a map unit. Descriptions of non-soil (miscellaneous areas) and minor map unit components are not included. This description is generated from the underlying soil attribute data. To see the Non-Technical description of the soil types, click here. For more information, contact: GIS Manager Information Technology & Innovation (ITI) Montgomery County Planning Department, MNCPPC T: 301-650-5620 U.S. Department of Agriculture USDA Natural Resources Conservation Service p: 1-833-ONE-USDA e: [e-mail]本数据集为数字土壤调查成果，整体属于美国国家合作土壤调查项目（National Cooperative Soil Survey, SSURGO）所产出的精度最高的土壤地理数据。 本数据集的信息通过三类方式编制：一是对地图进行数字化处理；二是将信息整合至平面校正基底后开展数字化作业；三是结合遥感与其他相关信息对数字化地图进行修订。 土壤调查中详细土壤地图上划定的图斑，对应调查区域内的各类土壤或杂类区域。本报告中的图斑描述与配套土壤地图，可用于确定单个图斑的组成与属性特征。 土壤地图上的图斑划定范围，代表以一种或多种主要土壤或杂类区域为主导的地表区域。图斑的标识与命名，依据其主导土壤的分类学分类进行。在同一分类学类别内，土壤属性拥有明确界定的取值范围。但土壤作为自然现象，具备所有自然现象固有的变异性特征。因此，部分观测到的属性范围可能超出该分类学类别的界定值。若不纳入其他分类学类别的区域，几乎不可能（即便尝试也无法）将单一分类学类别的土壤区域完整成图。因此，每个图斑均由其命名所依据的土壤或杂类区域，以及少量隶属于其他分类学类别的次要组分构成。 「图斑描述（精简版，自动生成）」报告将展示某一图斑中主要土壤的自动生成描述，且不包含非土壤（杂类区域）及次要图斑组分的相关说明。该描述由底层土壤属性数据自动生成。 如需查看土壤类型的非技术描述，请点击此处。 若需获取更多信息，请联系：蒙哥马利县规划部信息技术与创新（ITI）部门地理信息系统管理员，电话：301-650-5620；或美国农业部（United States Department of Agriculture, USDA）自然资源保护服务中心，电话：1-833-ONE-USDA，邮箱：[e-mail]