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Copy file name to clipboardExpand all lines: README.Rmd
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@@ -32,7 +32,7 @@ The Forest Inventory and Analysis Program ([FIA](https://research.fs.usda.gov/pr
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* mapping erosion risk [[11]](#references)
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* assessment of tree canopy cover estimation methods [[12, 13]](#references)
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Note that analysis or computation based on tree spatial pattern within a plot require input data with coordinates of individual stems given as aziumuth and distance from the sample center point. FIA no longer provide `AZIMUTH` and `DIST` attributes in the publicly available FIADB `TREE` table. The FIADB User Guide states that these attributes are now available by request from [FIA Spatial Data Services](https://research.fs.usda.gov/programs/fia/sds)[[14]](#references). Tree data without stem locations can be used in **FIAstemmap**with reduced functionality which includes predicting individual tree crown width and computing several stand structure metrics.
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Analysis or computation based on the tree spatial pattern within a plot require input data with coordinates of individual stems given as azimuth and distance from the sample center point. Note that FIA no longer provide `AZIMUTH` and `DIST` attributes in the publicly available FIADB `TREE` table. The FIADB User Guide states that these attributes are now available by request from [FIA Spatial Data Services](https://research.fs.usda.gov/programs/fia/sds)[[14]](#references). Tree data without stem locations can still be used in **FIAstemmap**for certain functionality, which includes predicting individual tree crown width and computing several stand structure metrics.
Helper functions are provided to facilitate analyzing FIA tree lists as Spatial Point Patterns using the **spatstat** library. `create_fia_ppp()` returns an object of class `"ppp"` representing the point pattern of an FIA tree list in the 2-D plane. This object can be used with functions of package **spatstat.explore** for additional plotting capabilty, computation of descriptive spatial statistics, and other exploratory data analysis.
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Helper functions are provided to facilitate analyzing FIA tree lists as Spatial Point Patterns using the **spatstat** library. `create_fia_ppp()` returns an object of class `"ppp"` representing the point pattern of an FIA tree list in the 2-D plane. This object can be used with functions of package **spatstat.explore** for additional plotting capability, computation of descriptive spatial statistics, and other exploratory data analysis.
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```{r spatstat-explore}
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# point pattern object for the plantation tree list
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