High-Resolution Land Cover, State of New Jersey, Delaware River Basin, 2013 2017

High-resolution land cover dataset for the State of New Jersey, Delaware River Basin. Twelve land cover classes were mapped:0 - Background1 - Water2 - Emergent Wetlands3 - Tree Canopy4 - Scrub/Shrub5 - Low Vegetation6 - Barren7 - Structures8 - Other Impervious Surfaces9 - Roads10 - Tree Canopy over Structures11 - Tree Canopy over Other Impervious Surfaces12 - Tree Canopy over RoadsThe complete class definitions and standards can be viewed at the link below.http://goo.gl/THacggThe primary sources used to derive this land-cover layer were 2013 leaf-on orthoimagery, 2015 leaf-off orthoimagery, and leaf-off LiDAR acquired across a series of dates during the period 2006-2015. Ancillary data sources such as road centerlines and hydrology were used to augment the land-cover mapping. This land-cover dataset is considered current based on data of acquisition for the leaf-on orthoimagery. Land-cover class assignment was accomplished using a rule-based expert system embedded within an object-based framework. Object-based image analysis techniques (OBIA) work by grouping pixels into meaningful objects based on their spectral and spatial properties, while taking into account boundaries imposed by existing vector datasets. Within the OBIA environment a rule-based expert system was designed to effectively mimic the process of manual image analysis by incorporating the elements of image interpretation (color/tone, texture, pattern, location, size, and shape) into the classification process. A series of morphological procedures were employed to insure that the end product is both accurate and cartographically pleasing. Following the automated OBIA mapping a detailed manual review of the dataset was carried out at a scale of 1:3000 and all observable errors were corrected.This dataset was developed to support land-cover mapping and modeling initiatives in the Delaware River Basin. At the time of its publication, it represented the most accurate and detailed land cover map for the New Jersey portion of the Delaware River Basin.

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=3147

高分辨率新泽西州土地覆盖数据集，涵盖特拉华河流域。该数据集共划分了十二种土地覆盖类别：0 - 背景区域；1 - 水域；2 - 漫滩湿地；3 - 树冠；4 - 灌木丛；5 - 低植被；6 - 荒地；7 - 建筑物；8 - 其他不透水表面；9 - 道路；10 - 建筑物上的树冠；11 - 其他不透水表面上的树冠；12 - 道路上的树冠。详细的类别定义和标准可通过以下链接查看：http://goo.gl/THacgg。本土地覆盖层的生成主要基于2013年叶片覆盖正射影像、2015年叶片脱落正射影像以及2006年至2015年期间多次获取的叶片脱落激光雷达数据。为增强土地覆盖映射，还使用了辅助数据源，如道路中心线和水文数据。根据叶片覆盖正射影像的采集数据，本土地覆盖数据集被视为当前数据。土地覆盖类别的分配是通过嵌入在面向对象框架中的基于规则的专家系统完成的。面向对象图像分析技术（OBIA）通过基于像素的光谱和空间属性将像素分组为有意义的对象，同时考虑现有矢量数据集施加的边界。在OBIA环境中，设计了一个基于规则的专家系统，通过将图像解释（色彩/色调、纹理、图案、位置、尺寸和形状）的要素纳入分类过程，有效地模拟了人工图像分析的过程。采用了一系列形态学过程以确保最终产品既准确又符合制图美学。在自动OBIA映射后，对数据集进行了1:3000比例的详细人工审查，并纠正了所有可观察到的错误。本数据集旨在支持特拉华河流域的土地覆盖映射和建模工作。在发布时，它代表了特拉华河流域新泽西州部分最为精确和详细的土地覆盖图。该数据由宾夕法尼亚空间数据访问（PASDA）托管，可通过PASDA地理空间数据 clearinghouse下载或访问：http://www.pasda.psu.edu/uci/DataSummary.aspx?dataset=3147。