City Limits

The geographic extent of a local government (City, Village, Township). Data downloaded from TNRIS 07/2014 (the data sources for each city polygon vary. Sources used were the Texas Department of Transportation data and local data from the council of governments or its component governments). The City of Richardson boundary replaced the given Richardson boundary in the downloaded data and then the boundaries of the cities touching Richardson were topologically cleaned up. Cities were selected within a distance of 75 miles from Richardson were kept and the others were deleted. Local FIPS codes were acquired from the census website and added to the attribute table. http://www.census.gov/census2010/xls/fips_codes_website.xls Metadata edited 10/2014本数据集涵盖地方行政单元（城市、村镇、乡镇）的地理范围。数据于2014年7月从德克萨斯州自然资源与信息系统（Texas Natural Resources Information System, TNRIS）下载，各城市多边形的数据源存在差异，所用数据源包括得克萨斯州运输部数据以及来自政府理事会或其下属政府的本地数据。下载数据中原给定的理查森市边界已被替换为标准理查森市边界，随后对所有与理查森市接壤的城市边界开展了拓扑清理操作。筛选出距离理查森市75英里范围内的城市予以保留，其余城市均被剔除。从美国人口普查网站获取本地联邦信息处理标准（Federal Information Processing Standard, FIPS）代码，并将其添加至属性表中，相关FIPS代码文件链接为http://www.census.gov/census2010/xls/fips_codes_website.xls。元数据于2014年10月完成编辑。