TREMATree 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

Forestry Botany Ecology Biodiversity assessment Conservation Environmental Impact assessment

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 informationPlace informationPlot 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 …

Plots and other sample typesIn TREMA, you can define many types of sample in a single database. Typical examples are:

Forest inventory dataStock mapsPermanent sample plots Botanical surveyBiodiversity assessment

Managing species dataTREMA has many tools to help handle the complexity of species names and uses in tropical forest

Multiple local namesAuto synonym updatesSpecies linked volume equationsAdd 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 buttonDefine your own tree volume equations or use the standard ones providedOptional 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 enumerationsError-checking is facilitated by inbuilt functionsCalculate increment, mortality and other time-related statisticsPSP mapping, for example, to display areas with higher mortalityGrid / 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 mapsTREMA handles complex rules for this processManual 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. rarityHighlight hotspots in your area based on species scoresPerform ordinations to show forest types in your dataFacilitate objective EIAsLink 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 systemsStyle-setting on forest maps can be automated, e.g. to give trees a symbol for the species, size by diameter and colour by commercial classTree 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 groupResults 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 databasesSpecialized 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 mapsData 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 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