Spatial Variables and the Nang Rong Projects
Spatial Variable Name

Description

Date

SACPC006

Network Analysis Variables:
A variety of distance measures were calculated for this variable,
including distances within Nang Rong District from 1983 villages to
health centers, district towns, and major intersections.

March, 1995

SACPC009

Network Analysis Variables:
Distance measures from villages to health centers within Nang Rong
District at different years were calculated for these variables.

March, 1995

SACPC017

Network Analysis Variables: These variables are similar to SACPC 006 and SACPC009, but extended to a buffer zone around Nang Rong District.

May, 1995

SACPC018

Network Analysis Variables: These variables are similar to SACPC 006 and SACPC009, but distances were calculated for different types of road surfaces.

June, 1995

SACPC026

Network Analysis Variables:
These variables are similar to SACPC018, but different assumptions were
made about roadtype attributes, such as travel speed and seasonality.

August, 1995

SACPC031

Land Competition and Pattern Metric Variables:
This set of variables deals with the dominance of different land cover
types at various buffer dimensions around villages. Additionally,
pattern metrics were calculated at different buffer dimensions around
villages.

March, 1996

SACPC037 
Land Competition Variables: These variables measure the density of villages within different buffer zones of other villages.

August, 1996

SACPC039

Pattern Metric and Soil Suitability Variables: This set of variables measures the biophysical and suitability conditions in different buffer zones around villages.

February, 1997

SACPC040a

Land Use Variables: These variables are measures of land use area percentages at variable buffer zones around villages.

June, 1997

SACPC043

Land Competition Variables:
Similar to SACPC031, these variables calculate the density of villages
at variable buffers as a proxy for land competition.

February, 1998

SACPC045

Land Use Variables:
Similar to SACPC031, this set of variables calculates the percentage of
various land use types at different buffer dimensions from villages.

February, 1998

SACPC046

Pattern Metric Variables:
These variables are a reworking of SACPC031, and recalculate a series
of pattern metrics at different buffer dimensions for a series of years.

February, 1998

SACPC047

Pattern Metric Variables:
These variables were calculated in support of a dissertation,
calculating pattern metrics for certain land covers at 2 kilometer
buffers around villages.

February, 1998 
SACPC048

Pattern Metric Variables: These
variables were calculated in support of a dissertation, calculating
pattern metrics for certain land covers at 2.5 kilometer buffers around villages. 
February, 1998

SACPC049

Pattern Metric Variables: These
variables were calculated in support of a dissertation, calculating
pattern metrics for certain land covers at 3 kilometer buffers. 
February, 1998

SACPC050

Pattern Metric Variables: These
variables were calculated in support of a dissertation, calculating
pattern metrics for certain land covers at 1.5 kilometer buffers around villages.

February, 1998

SACPC051

Pattern Metric Variables: These
variables were calculated in support of a dissertation, calculating
pattern metrics for certain land covers within Thiessen polygons representing potential village territories.

February, 1998 
SACPC052_1

Village Distance Variables: This variable is a calculation of the Euclidean distance, in kilometers, between all village pairs.

April, 1998

SACPC052_2 
Village Distance Variables:
This variable is a calculation of the Euclidean distance, in
kilometers, from the original study villages to all other villages.

April, 1998 
SACPC052_3 
Village Distances: This variable is the Euclidean distance from each original study village, in kilometers, to the nearest other village.

April, 1998 
SACPC052_4 
Village Distance Variables:
This variable is the Euclidean distance from each original study
village, in kilometers, to the Nang Rong district boundary.

April, 1998 
SACPC053_1 
Shared Land Variables: This variable calculates the percent of shared land, at 2 kilometer buffers, among the original study villages

April, 1998

SACPC053_2 
Shared Land Variables: This variable calculates the percent of shared land, at 3 kilometer buffers, among the original study villages

April, 1998

SACPC054 
Land Use, Land Cover, and Terrain Variables:
These variables calculate the percentage of each study village's
territory, at varying buffer dimensions, that are in each each land
use, land cover, and landform type.

December, 1998

SACPC056 
Intervening Bridges and Rivers Variables:
These variables calculate the number of bridges and rivers that are
encountered or crossed between all pairs of study villages.

August, 1999

SACPC057 
District Distance Variable: This variable calculates the Euclidean distance to the nearest district (not including Nang Rong district).

December, 1998

SACPC059a 
Study Village Buffer Overlap:
These variables calculate the percent of overlap between variable
buffers around study villages, as well as all district villages.

August, 1999

SACPC061 
Village Electrification Variable: This variable calculates the year in which each village within Nang Rong district was first electrified.

June, 2002

SACPC064 
Health Center Distance Variables:
In each year that a social survey was administered, these variables
calculate the network distance and travel time from the study villages
to health centers and hospitals.

September, 2003

SACPC065 
Land Use Matching Variables:
This variable pulls together householdlevel parcel data from Form 6
and the Land Use Matching Form. Information regarding the number
of parcels used per household, ages of parcels, and the land uses for
each parcel from 1999 to 2001 is included.

January, 2004

SACPC06667

Pixel Trajectory Variables:
These variables provide pixellevel information about land use and land
cover trajectories. The land use history of each pixel, which is
the sequence of changes each pixel has undergone throughout a
series of classified images, was created. Special emphasis was
placed on important deforestation, reforestation, and static
landscape scenarios.

November, 2004

SACPC068

Land Competition and Pattern Metric Variables: Similar to SACPC031, SACPC043, SACPC045 and SACPC046, these variables
are calculations of various measures of village competition, as well as 3
kilometer village buffer land use composition, terrain conditions, and
pattern metrics.

February, 2005

SACPC069

Bangkok Migrant Variables: These variables extract migrantlevel data from Forms 7, 8, 9 and 12.
The forms contain information regarding social and economic endowments,
economic activities, length of tenure in Bangkok, and other basic
demographic data (age, education, sex, etc.) for villagers who migrated to Bangkok from Nang Rong..

May, 2005

SACPC070

Bangkok Migrant Variables: These variables, extracted from SACPC069, are 2000 villagelevel
data that contain three population variables (total, male and
female) for the 40 migrant study villages. The second data set
(sacpc071) is the 2000 individuallevel data set that contains all
living individuals in the 40 migrant study villages.

June, 2005

SACPC071

Bangkok Migrant Variables: These variables, extracted from SACPC069, are 2000 individuallevel data that contain all
living individuals in the 40 migrant study villages.

June, 2005


