Vegetation - Auburn State Recreation Area [ds2956]

Tukman Geospatial LLC made this map under a subcontract from Space Imaging. Gary Walter was the contracting officer for the project at the Department of Parks and Recreation. The vegetation map was created using a combination of automated and manual techniques. Automated techniques included image segmentation, image classification, and GIS modeling. Manual techniques included manual editing and field work. Image segments were derived from 1-meter spatial resolution pansharpened IKONOS imagery, collected in the spring of 2004. The classification is based on the Manual of California 1995, which used series translated to NVC Alliance concepts by Tukman Geospatial. Automated techniques were used to create the polygon mapping units, or stand boundaries, for the project. The automatically created polygons are knows as segments and the process of creating them is called image segmentation. Segmentation produces good, consistent results and saves the labor of hand drawing stand boundaries on mylar over stereo air photos and then digitizing these hand drawn polygons. Over 14,000 image segments were automatically produced initially for this project using automated image segmentation. Image segments were derived from 1-meter spatial resolution pansharpened IKONOS imagery. The imagery was collected in the spring of 2004. More information can be found in the project report here, that is bundled with the dataset: https://filelib.wildlife.ca.gov/Public/BDB/GIS/BIOS/Public_Datasets/2900_2999/ds2956.zip The minimum mapping unit is 1.5 acres.图克曼地理空间有限责任公司（Tukman Geospatial LLC）受太空成像公司（Space Imaging）分包制作了该地图。加里·沃尔特（Gary Walter）为加利福尼亚州公园与娱乐部该项目的签约官员。本植被地图结合自动化与人工技术制作完成，其中自动化技术涵盖图像分割、图像分类及地理信息系统（GIS）建模，人工技术则包括人工编辑与野外实地作业。图像分割单元源自2004年春季采集的1米空间分辨率全色锐化IKONOS影像，该分类体系以《1995年加州植被手册》为依据，相关植被系列已由图克曼地理空间有限责任公司转换为国家植被分类（NVC）联盟的概念框架。自动化技术用于生成本次项目的多边形制图单元，即林分边界，自动生成的多边形被称为分割单元，其生成流程即为图像分割。图像分割可产出优质且一致的成果，同时省去了在聚酯薄膜（mylar）立体航空照片上手绘林分边界，再对手绘多边形进行数字化的繁重人力工作。本项目初始通过自动化图像分割技术自动生成了超过14000个图像分割单元，前述分割单元均源自2004年春季采集的1米空间分辨率全色锐化IKONOS影像。更多相关信息可查阅随数据集一同打包的项目报告，链接为：https://filelib.wildlife.ca.gov/Public/BDB/GIS/BIOS/Public_Datasets/2900_2999/ds2956.zip。本数据集的最小制图单元为1.5英亩。