Hi, I'm trying to use the attached jpg map of cumulative sound exposure levels (SELs) to estimate the SELs in specific locations. So I added the image to ArcMap Desktop 10.5.1 and georeferenced it to Australia. But I'm not sure what tool would be best to estimate the SELs. In a previous project, I used zonal statistics to get the mean of the specific variable in the sampling region but that doesn't work with the jpg image. I've tried to do some reading about this task but I don't think I'm wording it correctly. I tried converting the image from a 3 band raster to a single band raster using the Make Raster Layer tool but I lose a lot of the data. Does anyone have any advice or recommendations on the best way to use this image and the associated legend with the layers in ArcMap that have the sampling regions? Thanks in advance.
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Hi, I recently began my PhD in Australia (and am very new to ArcGIS) looking at vessel traffic density near previous sample sites along the west coast. I currently have our laboratory’s sample sites as a layer in ArcMap using the latitude and longitude but would like to create a layer with the vessel data. I’m trying to use AIS vessel data from the Australian Maritime Safety Authority which contains numerous files when downloaded from their site including .cpg, .dbf, .prj, .shp and .shx. I’ve been downloading by month so there is a lot of data included however I want to be able to cut the data down to specific dates to look at vessel traffic on a specific day. So I opened the .dbf file in excel and included in it is the Craft_Id, Lat, Long, Course, Speed, Vessel Type, Vessel Subtype, Length, Beam, Draught and Timestamp so I cut the data down to the day(s) that I needed and was adding the data to ArcMap as XY coordinates using the Lat and Long. But I want to be able to connect the coordinates based on craft_id and day so that each vessel has a track per day and then look at the density. But I can’t seem to find out how to do that. If anyone has any experience doing this I would be very grateful for the assistance. Thank you in advance.
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