TREMA
Tree Management and Mapping software
Raintop Computing - Oxford
What is TREMA?
TREMA is database and
analysis software that helps
forest managers and
researchers organise,
analyse and publish their
data efficiently and flexibly.
TREMA is the tool for
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Forestry
Botany
Ecology
Biodiversity assessment
Conservation
Environmental Impact assessment
Data you can store in TREMA
Species, Common name, Family, Genus,
subspecies, Volume equation, Species group,
Minimum legal diameter, Habit, Latex colour,
Buttresses, Crown width equation, Leaf shape,
Conservation value, Timber value, Protection
status, Commercial status, uses, and more …
TREMA has a core of
standard fields. Users
can add their own fields
without restriction.
The key ingredients of all
TREMA databases are:
Habitat type Forest reserve forest type, plot map
reference, plot manager/owner, soil type, climate
zone, Ordination score, and more ..
Plot number, Plot type, DBH, Girth, Plot area,
Height, Stem form, Canopy score, Seed tree
density, local rarity, Year last logged, annual
increment, recruitment and mortality, barcode,
Year last logged, Selection status, Log number,
and more …
Species information
Place information
Plot and other sample data
Plots and other sample types
In TREMA, you can define
many types of sample in a
single database. Typical
examples are:
Forest inventory data
Stock maps
Permanent sample plots
Botanical survey
Biodiversity assessment
Managing species data
TREMA has
many tools to
help handle the
complexity of
species names
and uses in
tropical forest
Multiple local names
Auto synonym
updates
Species linked volume
equations
Add your own species
fields
A tool for forest inventory
TREMA can handle any
size, shape or layout of
plot, as well as plotless
samples for rapid
biodiversity surveys
Output Volume, Basal area,
stem density tables at the
touch of a button
Define your own tree volume
equations or use the standard
ones provided
Optional error statistics
Permanent Sample Plots
TREMA’s inbuilt functions
allow users to error check
and analyse single and
multiple PSP enumerations
including increment,
recruitment and mortality
rates.
Store data from multiple
enumerations
Error-checking is facilitated by
inbuilt functions
Calculate increment, mortality and
other time-related statistics
PSP mapping, for example, to
display areas with higher mortality
Grid / cell functions
Yield allocation
The ability to plan and
monitor the selection of
specific trees within
economically and
ecologically viable limits is
fundamental to sustainable
selective logging activity
Forest management increasingly
requires timber yield to be allocated
based on stock maps
TREMA handles complex rules for
this process
Manual yield allocation is also
possible
Biodiversity assessment
The management of lists of
species in different places is
a basic TREMA skill, but you
can do much more to
prioritise conservation areas
or assess biodiversity
impact
Rank species according to your
own criteria – e.g. rarity
Highlight hotspots in your area
based on species scores
Perform ordinations to show forest
types in your data
Facilitate objective EIAs
Link to botanical voucher data
Mapping
TREMA’s mapping functions
provide all the map output
most users require for tree
plots and distribution maps,
either directly or through
links to ArcView.
Trema has an internal interactive
mapper and links to ArcView and
other GIS systems
Style-setting on forest maps can
be automated, e.g. to give trees a
symbol for the species, size by
diameter and colour by commercial
class
Tree coordinates can be calculated
from survey data
Stand tables
Stand tables can be
produced individually
or in automated
sequences
The basic table categories are
for Stems, Volume and Basal
area
Size class scheme, Volume
equations, filters and Area
settings can be adjusted
 Tables can also be restricted
to a selected species group
Results can be printed
directly or exported to Excel or
Word files
Adding data is easy
TREMA has rapid data entry
and editing facilities with
functions familiar to users
of Excel and Access. But,
TREMA has many
advantages over standard
spreadsheets and
databases:
Intelligent dictionaries to speed up
input of e.g. species names, volume
equations, plot localities.
Awareness of data structures
common to typical forest/ plant
databases
Specialized sample/plot data
checking functions
Flexible reporting
Users can design their
own simple or complex
report formats and store
these in the central
TREMA reports library
Reports can include graphics,
for example species images
and maps
Data can be calculated for the
report (e.g. total volume) or
included from a linked table
(e.g. Plant Family), even if the
current data-file does not
include this information.
Reports can be printed
directly from TREMA or sent to
your word processor
The benefits of TREMA
• Efficient use and reuse of data
• Easy archival of all
your data in one
database
• Enter your data once
for multiple outputs
• Simple and complex,
pre-defined and
custom analyses all
made easy