3. Existing physical factors which deviate 

 from the normal and have an influence on value. 



4. An annual report showing logged areas by 

 legal subdivision or mapped topographic unit, 

 the volume removed from each assessor's parcel, 

 the type of logging (clear-cut, selective), and 

 an estimate of the relationship of the value to 

 the volume of timber removed. 



FIELD SAMPLING 



Inventory procedures will normally be con- 

 fined to spot-checking submitted information 

 and examining areas reported as logged each 

 year. Some inventory estimates undoubtedly 

 will be made on properties for which no report 

 is obtained. 



To estimate timber volumes on large areas, 

 requires a statistical sample of a representative 

 portion of the property. This may be accom- 

 plished by "running" strips, which are spaced 

 equal distance apart in the parcel to be cruised, 

 making a complete count in the sample area, 

 and then relating the sample data to the whole. 

 Circular plots spaced at intervals may be used 

 in a similar way, and the number of plots or the 

 amount of strip sample may be determined 

 from prepared tables. 



A chart in the Appendix indicates the num- 

 ber of one-fifth acre plots to be used. The Tim- 

 ber property Cruise Record form in Chapter 

 VI, paragraph 604.25, presents a means of re- 

 cording the data. Appraisers generally work 

 alone in the field. Circular "plot cruising is more 

 adaptable to use by one man than strip cruis- 

 ing. For this reason, cruising by means of cir- 

 cular plots is recommended. 



SAMPLING BY PHOTOGRAMMETRIC 

 METHODS PLUS FIELD CHECKING 



In using mass appraisal techniques, com- 

 parison between comparable properties plays 

 an important part in arriving at value esti- 

 mates. To facilitate the comparison of similar 

 timbered areas, procedures using aerial photo- 



graphs and timber-type maps derived from 

 these photographs have been developed. Tim- 

 ber-type maps delineate timbered areas of 

 similar vegetative density and cover. 



The maximum use of available field and 

 office time will probably be realized by deter- 

 mining the existing timber types on an area 

 to be cruised and field checking the area by 

 types. This will result in the accumulation of 

 data which can be used to construct a sched- 

 ule of average volumes per acre by types which 

 is valuable in comparing similar properties. A 

 typical type map is shown in the Appendix. 



APPENDIX 



[Contents only] 



Examples of the application of the timber property 

 appraisal methods 



Short-term liquidation Example A 



Long-term liquidation Example B 



Deferred income Example C 



Long-term operation Example D 



Sustained yield operation Example E 



Combination operation Example F 

 Valuation factor tables 



Present worth valuation factors — Table I 



Present value of $1 Table II 



Mapping 



Planimetric maps 



Timber map legends 



Timber map example 



Timber type maps 



Type map legend 



Type map example 

 Timber inventory data 



Sample plots required 



Site tables 



Mixed selection forests of Sierra Nevada 



Douglas-fir 



Young-growth coastal redwood 



Truck transportation 

 Policies 



Policies and procedures for declaration of timber 

 maturity 

 Laws and opinions 



California Attorney General opinion 61/104 

 References 



Bibliography 



Directory 



16 



