error "sample is outside the bounding box of environmental data"

[Heiko]

Hey guys, I have the following problem:

I need to run Maxent for fish. I have subcatchments (derived from a DEM) and I have environmental variables (like precipitation) averaged or summed up in this subcatchments.
The species occurrence data within this subcatchments are of course on the river.

When I try to run the model it always says:
"sample at .... is outside the bounding box of environmental data, skipping." And this is true for every single sample.


Any suggestions how to fix that??

THANK YOU!!!!

[Jamie M. Kass]

Heiko,

Not clear exactly what the issue is, but if you input rasters that have values in the subcatchments and NA everywhere else, and the occurrence points are within the subcatchments, I can't imagine why you'd get this error. Can you explain in more detail the input rasters?

Jamie Kass
PhD Candidate
City College of NY

[Heiko]

Hi Jamie, thanks for your reply!

So, all the occurence points are in the subcatchments, that I am sure. But I am not so sure if there are NAs everywhere outside the subcatchment. I dont really get how to deal with NAs (see also my newest question). Maybe this is related even.
Do I have to change the rasters somehow?


Thank you,
Heiko

[Jacek Stefaniak]

Hi Heiko,

You probably have another geographic projection or you do not have same number of rows/columns on your coordinates and variables data. Look to the archive ;)

https://groups.google.com/forum/#!topic/maxent/Fk6V34kqSCU

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[Jacek Stefaniak]

And one more thing: in GIS you can see them as same, but most GIS software do "reprojection on the fly" - they show different projections as one, same. But in files which MaxEnt use, you probably have different projections written,.

[Heiko]

@ Jacek: I think you are absolutley right!! I did not realize that and probably because of this "on the fly transformation" everything seemed fine.
But now I checked: My occurrence data is in ETRS_89 and my layers are in GCS_Bessel_1981.

If I first load my occurrence data and then one of my layers, ArcGIS tells me its a different coordinate system. If I then choose ETRS_89, it still loads it with the old Bessel and nothing changes.
I also tried the "project" tool and I am guessing I have to enter something into the optional "Geographic Transformation" field.
Do you know how to ?

Thank you!!!

[Neftalí Sillero]

Hi,

Here you have the list of possible transformations between projection systems. Look for what you need and choose the most appropriated.

http://help.arcgis.com/en/arcgisdesktop/10.0/help/003r/pdf/geographic_transformations.pdf

It is always easy to project vectors than rasters. So, try to project your points to the projection system of the raster.

Best,

Neftalí

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Neftalí Sillero
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CICGE: Centro de Investigação em Ciências Geo-Espaciais

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[Jamie M. Kass]

Heiko, 

Glad you found the problem. When changing the projection in ArcGIS, make sure your raster has a definex projection first. This should be its native projection. If it doesn’t have one, use the Define Projection tool. Once it has a defined projection, you can use Project Raster.

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Jamie M. Kass
PhD Candidate, Dept. of Biology
City College of New York, CUNY Graduate Center

[David Betancourt]

Hola yo lo solucione haciendo nuevamente la tabla de registros nuevamente puedes intentar a ver si te funciona 

El martes, 30 de enero de 2018, 4:07:48 (UTC-6), Heiko escribió:

Hola chicos, tengo el siguiente problema:

necesito correr Maxent para pescar. Tengo subcuencas (derivadas de un DEM) y tengo variables ambientales (como la precipitación) promediadas o resumidas en estas subcuencas.
Los datos de ocurrencia de especies dentro de estas subcuencas están, por supuesto, en el río.

Cuando intento ejecutar el modelo, siempre dice:
"muestra en .... está fuera del cuadro delimitador de datos ambientales, saltando". Y esto es cierto para cada muestra individual.


¿Alguna sugerencia de como arreglar eso?

¡¡¡¡GRACIAS!!!!