sites.occur(1)	       Grass User's Manual	   sites.occur(1)



NNAAMMEE
       ssiitteess..ooccccuurr   -	Description of the site occurrence report
       produced by _s_._m_e_n_u.

DDEESSCCRRIIPPTTIIOONN
       This is a discussion of the site  occurrence  report  pro-
       duced by _s_._m_e_n_u_.

SSAAMMPPLLEE OOUUTTPPUUTT
				    SITE OCCURRENCE REPORT
			       Yakima Firing Center, Washington

       Location:  yakima
       Mapset:	  sample
       Site List: arch_erosion - archeology (34 sites)

       Analysis Region:
			   north: 5199975.00
	  west:  692975.00			 east:	737975.00
			   south: 5154975.00

       ============================================================================

       Layer:	arch_survey	       Archeologic  Survey  Areas
       (arch_survey)

       cells in analysis region:     810000
       sites in analysis region:	 34

									    degrees
				    cells	 %	 expected
       actual	chi	 of
       Site   Characteristics		cover	  cover     sites
       sites  square  freedom
       --------------------	     -------   -------	 --------
       ------ -------- -------
       (       0)	No	 data			   764310
       11

       (   1)  Hartmann,phase  1	 25821	   56.5      19.2
       6    9.088     1
       (   2)  Hartmann,phase  2	 11032	   24.1       8.2
       14    4.084     1
       (   3)  Wapora,phase  3		  8837	   19.3       6.6
       3    1.945     1
				   -------    -------	 --------
       ------ -------- -------
	     Totals		       45690	 100.0	     34.0
       23   15.117     2

       ============================================================================


EEXXPPLLAANNAATTIIOONN
       The  "Site  Occurrence  Report"	provides  aggregate  site
       information organized by raster map layers.


       The report header contains the following information:

       LLooccaattiioonn
	      GRASS database location (e.g., yakima),

       MMaappsseett GRASS mapset (e.g., sample)

       AAnnaallyyssiiss RReeggiioonn
	      the rectangular area in which the analysis was run,
	      reflecting  the  current geographic settings of the
	      user's mapset.

       SSiittee LLiisstt
	      name and description of the site list used for  the
	      report  and  the	number of sites in the list.  See
	      manual entry for _s_._m_e_n_u for more	discussion  about
	      these site lists.

       The  rest  of  the report is divided into reports for each
       raster map layers specified by the user.  In  this  SAMPLE
       OUTPUT, only one map layer (arch_survey) was specified.


       Certain information heads up each of these reports:

       llaayyeerr  identifies  the raster map layer along with the map
	      layer TITLE.

       cceellllss iinn aannaallyyssiiss rreeggiioonn
	      the size of the analysis region (in cells).

       ssiitteess iinn aannaallyyssiiss rreeggiioonn
	      the number of sites in the analysis region.

       For each map layer category which occurs in a cell falling
       within  the  boundaries of the analysis region, as well as
       totals for the map layer as a  whole,  various  statistics
       are presented:

       SSiittee CChhaarraacctteerriissttiiccss
	      These  are  the  numbers	(i.e.,	values) and names
	      (i.e., descriptions) for each category (i.e., char-
	      acteristic) which occurs in the map layer.

       cceellllss ccoovveerr
	      the  number  of cells in the analysis region having
	      the category value (i.e., site characteristic).

       %% ccoovveerr
	      the predominance of the category within the  analy-
	      sis region.

       eexxppeecctteedd ssiitteess
	      the  number  of  sites in the analysis region which
	      would be expected to be observed having  the  cate-
	      gory  value if all sites were evenly distributed by
	      in the region.

       aaccttuuaall ssiitteess
	      the number of sites in the  analysis  region  which
	      were occurred in cells having the category value.

       cchhii ssqquuaarree
	      gives the user a statistical test of the hypothesis
	      that For this hypothesis to be true, the chi-square
	      test  must  fail	since we are calculating expected
	      sites according to the hypothesis that

       ddeeggrreeeess ooff ffrreeeeddoomm
	      Number of degrees of  freedom  for  the  chi-square
	      test.   Each  category  value will have 1 degree of
	      freedom, and can be tested alone.  The  entire  map
	      layer  will  have 1 less degree of freedom than the
	      number of categories.


NNOOTTEE
       Category zero (0) throughout GRASS represents  "no  data".
       Therefore,  it is reported, but not included in the totals
       or in the computation of the chi-square statistics.

SSEEEE AALLSSOO
       _s_._d_b_._r_i_m

       _s_._i_n_._a_s_c_i_i

       _s_._m_e_n_u

       _s_._o_u_t_._a_s_c_i_i

       _s_._s_u_r_f_._i_d_w

       _s_i_t_e_s_._S

       _s_i_t_e_s_._f_o_r_m_a_t

       _s_i_t_e_s_._r_e_p_o_r_t

       _L_a_s_t _c_h_a_n_g_e_d_: _$_D_a_t_e_: _2_0_0_2_/_0_1_/_2_5 _0_5_:_4_5_:_3_5 _$



GRASS 5.0					   sites.occur(1)
