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Seabed Mapping available via Channel Coastal Observatory website

Posted 04/05/2016 15:36 by Anonymous

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Did you know that UK Seabed Mapping (Habitat and Substrate) data is freely available via Channel Coastal Observatory (CCO) website? This data may prove valuable to your coastal study? For example to help identify areas of different material types and compare with survey data. The following steps will help you utilise this data within SANDS:

1) Get the data via the Channel Coastal Observatory website www.channelcoast.org/

  • Select 'Map Viewer & Catalogue' then'View Maps & Search Data Catalogue'
  • Login (or register/Login)
  • Navigate the map and highlight the area of interest -Select 'Next' (all data for your selected area will be summarised)
  • Select the data required (in this case Seabed Mapping)
  • Select 'Next' and 'Add all results to basket' -Select 'View your basket' then 'Download basket'
  • Save the zip file to your system

2) Upload the data, view it in SANDS

  • Unzip the downloaded data (Tip, in the interests of good housekeeping create and unzip into a new 'Seabed Mapping' folder under the SANDS 'gis' project folder)
  • From the SANDS map window, select 'File' then 'Add Layer' (navigate and select the downloaded shape files).
  • The new layer(s) will now be visible in the map legend (e.g. Habitat and Substrate)

3) Colour code the data, edit in SANDS

  • From the SANDS map window, highlight and right click your new layer (e.g. Substrate) from the legend to edit 'Layer Properties'
  • Select 'Wizard' then select the appropriate field to differentiate the data (e.g. Substrate)
  • Select 'Next' (you will see a list of attributes e.g. Coarse Sediment, Rock, Sand etc.)
  • Select 'Next' then 'Apply' then 'OK' (the various Substrate areas will become coloured and the map legend will display the various Substrate areas)

4) Examine the data, use it in SANDS

  • From the SANDS map window, highlight the 'Attributes' tab, as you select the different Substrate areas the type and size will be displayed
  • Substrate areas may be compared with topographic and bathymetric survey data if required

Using photos taken with a Smartphone?

Posted 24/03/2016 15:49 by Anonymous

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Photographs taken with a Smartphone or Tablet with GPS capability can be used in SANDS. The device records the geographic location of the photo and stores this information within the image, when images are imported into SANDS the location data is used to position them in the correct geographic location on the map.

A six step 'how to' guide:

1) Copy the images from the device to the SANDS machine:

  • Connect the device to a computer via an appropriate USB charging cable or lightning cable etc.
  • Use windows explorer to navigate the internal storage of the device and copy the required images (The required images could also be emailed to the SANDS machine)
  • Paste the required images to an appropriate sub-folder under your SANDS project folder

2) Consider how you want to associate the images into SANDS:

  • All data in SANDS is associated to SANDS locations, these can be existing locations or new locations can be setup for the purpose (guidance on setting up new locations is provided in the SANDS user guide)

3) Ensure you have set the appropriate coordinate system for the map:

  • From the Map window under 'Map', 'Coordinate System' e.g. for the UK select 'Projected System' and OSGB 1936 British National Grid (epsg:27700)
  • Save the setup, from the Map window under 'File', 'Save All'

4) Import the images into SANDS:

  • From the Map window under 'Map', 'Import GPS Photos to Inspections'
  • The window allows the user to select the required images and the map layer they will be associated to, a search radius can be set to associate images to the appropriate (nearest) SANDS locations
  • Press 'Save'

5) View the images (via SANDS locations):

  • Simply right click a location, then select 'Photos'

6) Plot and view the images (via image position):

  • From the Map window under 'Map', ' Plot Photo GPS Locations' (a new map layer will be created displaying positions of the images plus a line to illustrate the camera direction)
  • Select the Camera icon from the map toolbar (to show/hide the Location Photos list)
  • Select the image position from the map (if displayed images are clicked the image position will be highlighted on the map).

Duplicate line type Locations within the same Location Type layer?

Posted 25/06/2015 11:49 by Anonymous

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How do I create duplicate line type Locations within the same Location Type layer?

Locations related to particular Location Type layers exist behind SANDS as shape files, we can use these shape files to duplicate Locations:

1) Note down the name and location of the shape file (layer) you wish to duplicate. Via the Map, select the appropriate layer from the Legend, right click the mouse, select Layer Properties then Layer tab, you will find the information under Path

2) Close Map.

3) Create an additional (temporary) Location Type Name layer (for line type Locations this needs to be GIS Type LINE). Via Locations, Location Type Admin

4) Import the existing shape file (the file related to the Locations you wish to duplicate). Via Locations, Location List, Import GIS file as Locations Ensure you import to your new Location Type Name... under Select Location type to import locations to

5) Edit the temporary names of the newly created (duplicated) locations to become something meaningful. Via Locations, Location List TIP, the most recent entries will be added to the end of the list, click Location ID to re-sort the list.

6) Relate the duplicated Locations to the same Location Type Name as the originals. I.e. Edit Location Type Name from the temporary Location Type Name to the original Location Type Name. Via Locations, Location List

7) The new (temporary) Location Type Name layer is now redundant and can be deleted. Via Locations, Location Type Admin

8) Duplicated Locations will now exist alongside the originals (I.e. the same Location Type and appear on the same Map Layer ) Duplicated locations can now be edited, modified or moved as appropriate.

Hopefully this helps?

Videos and Photos from UAV

Posted 02/04/2015 10:57 by Anonymous

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The SANDS team at CH2MHILL are currently working on a coastal study in Trinidad. The study area has been filmed from an Unmanned Aerial Vehicle (UAV). In order to share this data with the team (alongside other project data) the aerial videos have been linked to location markers on the SANDS map. In addition, georeferenced aerial photographs have been extracted from the flights (every 10 seconds), these have been imported/plotted automatically to provide easy access to the images and illustrate the flight path of the UAV.

Photos taken with GPS camera?

Posted 01/04/2015 16:29 by Anonymous

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Photos taken with a GPS camera can be automatically associated to a location, markers can be plotted on the map to show the locations of the photos.

How is this done?

From the Map window under 'Map' , 'Import GPS Photos to Inspections' and 'Plot Photo GPS Locations'.

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