TREMA Tree Management and Mapping software Raintop Computing -
Oxford
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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 Forestry
Botany Ecology Biodiversity assessment Conservation Environmental
Impact assessment
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Data you can store in TREMA TREMA has a core of standard
fields. Users can add their own fields without restriction. The key
ingredients of all TREMA databases are: Species information Place
information Plot and other sample data 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 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
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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
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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
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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
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Permanent Sample Plots TREMAs 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
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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
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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
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Mapping TREMAs 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
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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
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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
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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
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The benefits of TREMA Efficient use and re- use 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