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Found 7 results

  1. Hi all, I have a few geolocator files that I have not been able to process ( The location estimates are scattered all across the specified grid) and I believe it has something to do with the plot_slopes_by_location function. I know that this function is just to determine whenever the bird leaves the study site, however, in the graph it revealed that there are no dusk estimates after September (see attached picture). All of the geolocators that I have been unable to analyze have this similar problem. I'm not sure if that's actually the root of my problems or if its something else, this is
  2. Bonjour, I am working with geolocators data collected with Intigeo C65 devices on seabirds breeding in the Arctic (higher red dot on map1) and migrating in southern Atlantic in winter. Parts of the migration occurs during spring and fall equinoxes. I used a rooftop cablibration made in southern Quebec (lower red dot on map1) for about 14 days and I used the findHEZenith function to calculate a new zenith angle on the wintering area. Then I set a list of Zenith changing depending on the period of the year. All my script is running, but for some birds, I have a strange movement up-nor
  3. Hello everyone, I have recently begun trying to process a .lig file using TwGeos( although I also have .lux files as well) and i have been having some general problems most likely due to my lack of experience with this software, so I apologize if i'm asking introductory level questions. The code that I have been using is: palette=c(5,2, 9, 3, 4, 1, 13) Twl<-preprocessLight(Bird, threshold = 1.5, offset = 17, lmax = 64, zlim = c(0,64), extend = 0, dark.min = 0, twilights = NULL, stage = 1, point.cex = 0.8, width = 12, height = 4, palette = palette ,gr.
  4. While using FLightR I am still having a few points fall over the Ocean. I thought that establishing the grid within FLightR and setting the “distance.from.land.to.use=c(-Inf, Inf)” would prevent any points from falling into the Ocean? This is only occurring for a few of the geolocators that I have analyzed although I am still baffled to why this is occurring on the select few. Any advice on why this is happening and/or how to correct this problem would be greatly appreciated. Cheers, Devin
  5. I'm using FLightR to process my geolocator data. After performing the run.particle. filter I am able to plot it successfully using map.FLightR.ggmap, my issue comes after that, I would like to be able to plot those points in ArcMap. Is there a way in which I can export the Lat/Long data and its associated dates from the run.particle.filter to either a .csv or a shapefile? I'm aware that a previous post mentioned it being easy using the ("add xy data") but i couldn't figure it out. Any advice would be greatly appreciated. Thank you, Devin
  6. I would like to estimate (with uncertainty) the cumulative distance traveled by an organism between two specific time periods. Let's say that I used the find.times.distribution function to identify that a tagged bird most likely commenced spring migration on 1 April 2016 and most likely reached its breeding grounds on 23 April 2016. I would like to sum the distance traveled by that bird between every consecutive twilight from 1 April to 23 April. The ideal final result would be something like, "The cumulative spring distance traveled between 1 April and 23 April was median=1034.2 km (95%
  7. Dear colleagues, We are preparing a database for a meta-analysis of the effect of geolocators on migratory songbirds and near-passerines. I am writing you to kindly ask for some basic information regarding your geolocator projects. We are aware that a couple of meta-analytical studies have already appeared, but the number of published geolocator studies has been increasing and, more importantly, we would like to include -if possible- also unpublished data. We feel that a not negligible part of the studies that have employed geolocators may have remained unpublished, especially in cases when
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