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Marine GIS Data Model Example data problems for marine analysis. P.N. Halpin E.A. Treml Nicholas School of the Environment And Earth Sciences Duke University. Marine GIS Data Model . Georelational model. Geodatabase model . Halpin & Treml 2002.

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marine gis data model example data problems for marine analysis

Marine GIS Data ModelExample data problems for marine analysis

P.N. Halpin

E.A. Treml

Nicholas School of the Environment

And Earth Sciences

Duke University

slide2

Marine GIS Data Model

Georelational model

Geodatabase model

Halpin & Treml 2002

slide3

Marine GIS Data Model sampling

  • Marine data is collected through a wide range of:
  • Methods
  • Instruments
  • Time scales
  • Periodicity
  • Precision
  • Accuracy

Halpin & Treml 2002

slide4

Marine GIS Data Model

  • Marine GIS Applications are especially complex due to…
    • Wide array of sampling media
    • Data types
    • Data dependencies* (e.g. time, effort…)

Halpin & Treml 2002

slide5

Marine GIS Data Model

Recently a team got together to begin the development of a standard marine data model…

The central issue:

How do we do a better job of analyzing a 4 dimensional marine world with 2.5D GIS software…

Halpin & Treml 2002

slide7

Marine GIS Data Model

Halpin & Treml 2002

slide9

Marine GIS Data Model

Georelational model

Geodatabase model

Halpin & Treml 2002

slide10

Marine GIS

Data Model

An extension of GIS features to better fit marine applications…

This is a conceptual diagram…

How implement this is open for discussion…

Halpin & Treml 2002

marine gis data model example
Marine GIS Data Model Example

Goal:

To begin with example data that fills as many different data types as possible.

Halpin & Treml 2002

marine gis data model example1
Marine GIS Data Model Example

Gulf of Maine

Selected due to rich history of data collection across a wide range of marine science and management disciplines.

Halpin & Treml 2002

gulf of maine sounding and elevation data
Gulf of Maine: Sounding and Elevation Data

National Ocean Service (NOS) Hydrographic Data Base

Shiptrack bathymetry data

(GLOBEC)

Grid bathymetry data

(GLOBEC)

http://pubs.usgs.gov/openfile/of98-801/bathy/data.htm

Halpin & Treml 2002

gulf of maine bathymetry grids contours
Gulf of Maine: Bathymetry GRIDS & Contours

15 arc-sec bathymetry rasters

100m contours vector

http://pubs.usgs.gov/openfile/of98-801/bathy/data.htm

Halpin & Treml 2002

gulf of maine
Gulf of Maine

Dynamic hydrographic circulation models

Streamfunction

Finite Element Model

Model TIN nodes

Dartmouth College, Hanover, New Hampshire, U.S.A.

http://www-nml.dartmouth.edu/circmods/gom.html

Halpin & Treml 2002

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Gulf of Maine

Dynamic hydrographic circulation models

Drifter tracking simulation

Dartmouth College, Hanover, New Hampshire, U.S.A.

http://www-nml.dartmouth.edu/circmods/gom.html

Halpin & Treml 2002

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Gulf of Maine

SST Gradients & Fronts

Synoptic data collection of SST (SeaWiFs-AVHRR) processed to develop gradient and distance to front raster data sets.

SST Fronts

Distance from SST fronts (surface)

Halpin & Treml 2002

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Gulf of Maine

Fisheries survey data

Ground fish stocks

Halpin & Treml 2002

marine gis data model example2

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Marine GIS Data Model Example

Goal:

To begin with example data that fills as many different data types as possible.

Halpin & Treml 2002

gulf of maine4
Gulf of Maine

Fixed X,Y,Z Data

NMS/NOAA Baseline Point Data

Offshore boundaries

Data source: USGS-NOAA

Halpin & Treml 2002

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Gulf of Maine

Fixed X,Y,Z Data

NOS Bathymetric Point Data

Data source: USGS-NOS

Halpin & Treml 2002

gulf of maine6
Gulf of Maine

Cruise Survey

Observation Data

Harbor Porpoise (Fall 1999).

Data source: Debi Palka, NMFS

Halpin & Treml 2002

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Gulf of Maine

Cruise Survey

Observation Data

1) SPP all species are harbor porpoises

2) strata. This could be:

high density (high),

intermediate density (interm),

inshore,

offshore, and

extra.

3) team. This can be either upper or lower. Some of the groups of porpoises were seen by only the upper team, others by only the lower team, and some were seen by both teams. All sightings are included no matter what its duplicate status.

4) year, month, day.

Data source: Debi Palka, NMFS

Halpin & Treml 2002

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Gulf of Maine

Cruise Survey

Observation Data

5) transect. This is a straight piece of effort, which could be made of several legs.

6) leg. This is part of a transect where everything is the same, ie. observer placement, weather.

7) obsnum. This is a unique sighting number for an animal group seen by a team on a particular day.

8) sighttype. This can be either “O” for original or “F” for follow-on sighting. That is “O” is the first time that group was seen and “F” is the same group but a later surfacing. So for a group that had two recorded surfacing, the obsnum is the same but the first has sighttype=”O” and the second has sighttype=”F”.

Data source: Debi Palka, NMFS

Halpin & Treml 2002

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Gulf of Maine

Cruise Survey

Observation Data

10) sizeb. This is the best estimate for the size of the group.

11) raddist. This is the estimate of the distance (in meter) between the ship and the group.

12) angle. This is the estimate of the angle between the track line (0 degrees) and line of sight to the group. 90 degrees is 90 degrees to the starboard, 270 degrees is 90 degrees to the port.

13) swmdir. Estimated direction the group was swimming at the time of the recording. Use same compass angles as in 12) angle.

Data source: Debi Palka, NMFS

Halpin & Treml 2002

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Gulf of Maine

Cruise Survey

Observation Data

14) sightlat and sightlong. Position of the ship at the time of the sighting. NOT the exact position of the group. Format is degree.fraction of a degree. For example, 43 degrees 30 minutes is 40.50.

15) beaufort. Beaufort sea state. Not necessarily the wind speed. Format is the normal beaufort sea state (usually an integer) and an estimation of the percentage between the integer beaufort sea states. So beaufort 2.9 is almost a beaufort 3 but not quite.

16) shipspeed. Ship’s speed through the water.

17) smg. “Speed made good” over the ground.

Data source: Debi Palka, NMFS

Halpin & Treml 2002

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Gulf of Maine

Recording Buoys

Hydrodynamic Data

Data source:

Halpin & Treml 2002

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Gulf of Maine

Recording Buoys

Selected Buoy data attributes (1978 to present):

Wind Direction (WDIR): measured ever 10 minutes 24hours a day

Wind Speed (WSPD): measured ever 10 minutes 24hours aday

Wind Gust (GST): measured every hour 24hours a day

Wave Height (WVHT): measured every hour 24hours a day

Dominant Wave Period (DPD): measured every hour 24hours a day

Atmospheric Pressure (PRES): measured every hour 24hours a day

Pressure Tendency (PTDY): measured every hour 24hours a day

Water Temperature (WTMP): measured every hour 24hours a day

Note: for standard meteorological data, there are approximately 200k measurements since 1978, approximately 2400 for the duration of this marine mammal study.

Data source: http://www.ndbc.noaa.gov/station_history.phtml?station=44005

Halpin & Treml 2002

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Gulf of Maine

Harbor Porpoise

Telemetry Data

5 animals tracked as point observations over time (Fall 1999).

Data source: Tara Cox, Duke University

Halpin & Treml 2002

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Gulf of Maine

Shoreline

Shoreline Vector Data

NOAA Medium Resolution Shoreline .

Data source: NOAA

Halpin & Treml 2002

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Gulf of Maine

Bathymetry

Research cruise route*

Data source: Anonymous

Halpin & Treml 2002

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Gulf of Maine

Prey (Silver Hake < 40cm)

Trawl Data

Silver Hake < 40cm (Fall 1999).

Data source: Tara Cox, Duke University

Halpin & Treml 2002

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Gulf of Maine

Prey (Silver Hake < 40cm)

Trawl Data: Silver Hake < 40cm (Fall 1999).

Example: Time-duration vector

Data source: Tara Cox, Duke University

Halpin & Treml 2002

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Gulf of Maine

Cruise Survey

Effort Data

Time duration effort (Fall 1999).

Data source: Debi Palka, NEFMS

Data source: Debi Palka, NMFS

Halpin & Treml 2002

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Gulf of Maine

Cruise Survey

Time duration effort data (Fall 1999).

Same as in sighting data for variables strata, year, month, day, transect, leg, and beaufort.

1) begtime, endtime. Time the leg began and ended. Format same as sighttime above.

2) beglat, beglong. Corresponding latitude and longitude for the time the leg began. Format same as sightlat above.

3) endlat,endlong. Corresponding latitude and longitude for the time the leg ended.

Data source: Debi Palka, NMFS

Halpin & Treml 2002

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Gulf of Maine

SBNMS Boundary

Boundary / Area Data

Stelwagen Bank (SBNMS)

Data source: NOAA

Halpin & Treml 2002

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Gulf of Maine

Time-Area Closures

Time-area Data

Data source:

Halpin & Treml 2002

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Gulf of Maine

Bathymetry

Depth Data

15 minute bathymetry raster grid .

Data source:

Halpin & Treml 2002

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Gulf of Maine

Distance from Fronts

SST / Front / Distance Data

Raster Data Model?

?

Data source: Rob Schick NEA http://marinegis.org

Halpin & Treml 2002

slide40

Marine GIS Data Model

Example Data and the current data model:

The existing data model defines a generic, conceptually designed framework.

This current structure requires extensive manipulation / customization to allow for the incorporation of “real” data.

Halpin & Treml 2002

slide41

Marine GIS Data Model

Example Data Questions:

What types of data are missing? Should be included?

What relationships should be included?

What should be optional vs. required?

Halpin & Treml 2002

slide42

Marine GIS Data Model

Questions for Discussion:

Should temporal components be treated as optional attributes within a geodatabase or as required variables of new “features classes”?

Should there be a more generic dynamic / temporal dependent feature class extensions (useful to marine, atmospheric, hydrologic… disciplines?).

Should there be a single “marine data model” or more field specific models: benthic mapping, navigation, pelagic-animal tracking, oceanographic, bottom mapping…?

Halpin & Treml 2002