Tree Inventory
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This dataset includes Tempe’s tree inventory data and benefits of the trees as calculated by i-Tree Eco in October 2021. The dataset was put together by West Coast Arborists, Inc. (WCA) in 2021. About Tempe's Tree Inventory and i-Tree Eco This dataset contains the point locations and attributes of trees within City of Tempe and Facilities. The point dataset was originally collected by WCA, Inc. in 2017 and is routinely updated by WCA and the City of Tempe. The attributes used included TreeID, Exact DBH, Height Range, Exact Height, Condition, Botanical Name, Common Name, Latitude, and Longitude. Updates to the Tempe's point layer was made using the results from i-Tree Eco. An i-Tree Eco Analysis was run in September 2021 using i-Tree Eco v6.0.22 and the results were joined based on unique tree ID to Tempe's Tree inventory. The results from i-Tree Eco were added as attributes to the Tempe's Tree inventory. Attributes added were: Structural Value ($), Carbon Storage (lb), Carbon Storage ($), Gross Carbon Sequestration (lb/yr), Gross Carbon Sequestration ($/yr), Avoided Runoff (cubicFT/yr), Avoided Runoff ($/yr), Pollution Removal (oz/yr), Pollution Removal ($/yr) , Total Annual Benefits ($/yr), Height (ft), Canopy Cover (sqft), Tree Condition, Leaf Area (sqft), Leaf Biomass (lb), Leaf Area Index Basal Area (sqft), Cond, i-Tree_ID_BotName, i-Tree_ID_ComName and i-Tree_ID Genus. The exact definitions, meanings, calculations, etc. for the i-Tree Values can be found on i-Tree’s website via the i-Tree Eco User Manual. i-Tree Eco. i-Tree Software Suite v6.x. Web. Fall 2021. https://www.itreetools.org i-Tree Eco Manual: https://www.itreetools.org/documents/275/EcoV6_UsersManual.2021.09.22.pdf Tempe Tree and Shade Coverage (data hub site): https://urbanforestry.tempe.gov/ Additional Information Source: West Coast Arborists, Inc. (WCA) 2021; i-Tree Eco v6 2021 Contact: Richard Adkins Contact E-Mail: richard_adkins@tempe.gov Data Source Type: GPS and Google map data; tables in CVS and Excel format Preparation Method: Field observations and records of individual trees; value calculations based on i-Tree Eco v6 found at https://www.itreetools.org/support/resources-overview/i-tree-manuals-workbooks Publish Frequency: Every 5 years or as data becomes available Publish Method: Manual Data Dictionary
本数据集包含坦佩市（Tempe）树木清查数据，以及2021年10月通过i-Tree Eco计算得到的树木生态效益值。本数据集由西海岸Arborists有限公司（West Coast Arborists, Inc.，简称WCA）于2021年整合完成。 ### 坦佩市树木清查与i-Tree Eco说明 本数据集涵盖坦佩市及辖区设施范围内的树木点位坐标与属性信息。该点位数据集最初由WCA公司于2017年采集，并由WCA与坦佩市定期更新维护。其包含的属性字段包括：树木编号（TreeID）、精确胸径、树高区间、精确树高、健康状况、植物学名、通用俗名、纬度及经度。 本次坦佩市树木点位图层的更新依托i-Tree Eco的分析成果完成。研究团队于2021年9月使用i-Tree Eco v6.0.22版本开展分析，并通过唯一树木编号将分析结果与坦佩市树木清查数据进行关联匹配，最终将i-Tree Eco的计算结果作为新增属性字段整合至坦佩市树木清查数据集。新增属性字段包括：结构价值（美元）、碳储量（磅）、碳储量价值（美元）、总碳固存量（磅/年）、总碳固存价值（美元/年）、径流减排量（立方英尺/年）、径流减排价值（美元/年）、污染物去除量（盎司/年）、污染物去除价值（美元/年）、年度总效益（美元/年）、树高（英尺）、冠幅覆盖面积（平方英尺）、树木健康状况、叶面积（平方英尺）、叶片生物量（磅）、叶面积指数、胸高断面积（平方英尺）、状况标识（Cond）、i-Tree学名关联ID（i-Tree_ID_BotName）、i-Tree俗名关联ID（i-Tree_ID_ComName）及i-Tree属名关联ID（i-Tree_ID Genus）。 关于i-Tree相关数值的准确定义、含义及计算方法等内容，可通过i-Tree官方网站的i-Tree Eco用户手册查阅： i-Tree Eco. i-Tree Software Suite v6.x. Web. Fall 2021. https://www.itreetools.org i-Tree Eco用户手册：https://www.itreetools.org/documents/275/EcoV6_UsersManual.2021.09.22.pdf 坦佩市树木与遮阴覆盖数据（数据枢纽站点）：https://urbanforestry.tempe.gov/ ### 附加信息来源 西海岸Arborists有限公司（WCA），2021年；i-Tree Eco v6，2021年 联系人：Richard Adkins 联系邮箱：richard_adkins@tempe.gov 数据来源类型：GPS与谷歌地图数据；CVS及Excel格式表格 制备方法：单棵树木的野外观测与记录；基于i-Tree Eco v6的效益值计算，详见https://www.itreetools.org/support/resources-overview/i-tree-manuals-workbooks 发布频率：每5年一次，或在有新数据可用时更新 发布方式：手动数据字典
