Example forest inventory data

Example data to illustrate the creation of forest objects from inventory data

Source

• Data tables piesMayoresIFN2, piesMenoresIFN2 and matorralIFN2 were extracted from the Second Spanish National Forest Inventory.

• Data tables piesMayoresIFN3, regeneraIFN3 and matorralIFN3 were extracted from the Third Spanish National Forest Inventory.

• Data table poblet_trees corresponds to field data sampled by the Catalan Forest Ownership Center (Centre de la Propietat Forestal; CPF).

Details

Six example data tables were extracted from the second and third surveys of the Spanish National Forest Inventory (IFN2 and IFN3), to illustrate function IFN2forest:

• piesMayoresIFN2 - Data frame with tree data (79 observations and 9 variables) from IFN2.

  • Provincia - Spanish province code (character)

  • Estadillo - Plot code within province (character)

  • ID - Plot ID, resulting from the concatenation of 'Provincia' and 'Estadillo' (character)

  • OrdenIf2 - Tree code in the plot (character)

  • Especie - Species code in IFN2 (character)

  • Dn1: Diameter at breast height (in mm), first measurement.

  • Dn2: Diameter at breast height (in mm), second measurement.

  • Ht: Total tree height (in m)

• piesMenoresIFN2 - Data frame with tree regeneration data (27 observations and 7 variables) from IFN2.

  • Provincia - Spanish province code (character)

  • Estadillo - Plot code within province (character)

  • ID - Plot ID, resulting from the concatenation of 'Provincia' and 'Estadillo' (character)

  • Especie - Species code in IFN2 (character)

  • Numero - Number of stems for 2.5-7.5 cm DBH class (integer)

  • Hm - Average tree height (dm)

  • Regena - Regeneration code ('0', 1', '2', '3') (integer)

• matorralIFN2 - Data frame with shrub data (20 observations and 6 variables) from IFN2.

  • Provincia - Spanish province code (character)

  • Estadillo - Plot code within province (character)

  • ID - Plot ID, resulting from the concatenation of 'Provincia' and 'Estadillo' (character)

  • Especie - Species code in IFN2 (character)

  • Fcc - Shrub cover value (%)

  • Hm - Average shrub height (dm)

• piesMayoresIFN3 - Data frame with tree data (118 observations and 13 variables) from IFN3.

  • Provincia - Spanish province code (character)

  • Estadillo - Plot code within province (character)

  • Clase - Plot type (character)

  • Subclase - Plot subtype (character)

  • IDPARCELA - Plot ID, resulting from the concatenation of 'Provincia' and 'Estadillo' (character)

  • IDCLASE - Plot type ID, resulting from the concatenation of 'Clase' and 'SubClase' (character)

  • ID - Unique plot ID, resulting from the concatenation of 'IDPARCELA' and 'IDCLASE' (character)

  • OrdenIf2 - Tree code in the plot during IFN2 (character)

  • OrdenIf3 - Tree code in the plot during IFN3 (character)

  • Especie - Species code in IFN3 (character)

  • Dn1: Diameter at breast height (in mm), first measurement.

  • Dn2: Diameter at breast height (in mm), second measurement.

  • Ht: Total tree height (in m)

• regeneraIFN3 - Data frame with tree regeneration data (86 observations and 13 variables) from IFN3.

  • Provincia - Spanish province code (character)

  • Estadillo - Plot code within province (character)

  • Clase - Plot type (character)

  • Subclase - Plot subtype (character)

  • IDPARCELA - Plot ID, resulting from the concatenation of 'Provincia' and 'Estadillo' (character)

  • IDCLASE - Plot type ID, resulting from the concatenation of 'Clase' and 'SubClase' (character)

  • ID - Unique plot ID, resulting from the concatenation of 'IDPARCELA' and 'IDCLASE' (character)

  • Especie - Species code in IFN3 (character)

  • CatDes - Regeneration category, either '1', '2', '3' or '4' (character)

  • Tipo - Kind of regeneration (character)

  • Densidad - Density category ( 1', '2', or '3') (character)

  • NumPies - Number of stems (for CatDes == '1') (numeric)

• matorralIFN3 - Data frame with shrub data (43 observations and 10 variables) from IFN3.

  • Provincia - Spanish province code (character)

  • Estadillo - Plot code within province (character)

  • Clase - Plot type (character)

  • Subclase - Plot subtype (character)

  • IDPARCELA - Plot ID, resulting from the concatenation of 'Provincia' and 'Estadillo' (character)

  • IDCLASE - Plot type ID, resulting from the concatenation of 'Clase' and 'SubClase' (character)

  • ID - Unique plot ID, resulting from the concatenation of 'IDPARCELA' and 'IDCLASE' (character)

  • Especie - Species code in IFN3 (character)

  • Fcc - Shrub cover value (%)

  • Hm - Average shrub height (dm)

An additional data table comes from an independent forest inventory survey, used to illustrate the general function forest_mapTreeTable:

• poblet_trees - Data frame with example tree plot data from Poblet, Catalonia (717 observations and 4 variables).

  • Plot.Code - Plot ID (character)

  • Indv.Ref - Tree individual (integer)

  • Species - Species name (character)

  • Diameter.cm - Tree diameter at breast height (cm)