Questions tagged [maxent]
Software and algorithm for ecological niche modeling.
45
questions
0
votes
0answers
37 views
Using Habitat Categorical Variables in Maxent
I'm trying to predict shorebird distributions using habitat variables, using Maxent to model. I have 4 categorical data (wetlands, waterbodies, tilled, beach) and 1 continuous data layer (topographic ...
0
votes
0answers
50 views
Maxent “NO DATA_value” Error
I am trying to run Maxent and I have processed all layers and converted them into .asc files (all layers have the same resolution and extent), there are no 'No Data' areas within the projection extent ...
2
votes
1answer
61 views
Getting startAsciiWriting (x, filename, …) error in R?
I am new to R. I am trying to transform elevation data in R for input into MaxEnt. Returned:
Error in .startAsciiwriting (x,filename ...): x has unequal horizontal
and vertical resolutions. Such ...
0
votes
0answers
223 views
Maxent error: Error projecting, two layers have different geographic dimensions
When I run climate data (signed 16 bit) and land use data (unsigned 8 bit) on Maxent, I got an error message:
Error projecting: java.io.IOException: Files bio6 and alt in directory
D:\WorldClim\...
2
votes
1answer
90 views
Extracting residuals of maxent model in R?
I used "dismo" package in R, and ran a build a maxent model. Now I want to extract the residuals from the model in order to run a Moran I test later. But I got an error.
The code was like:
xm<-...
1
vote
1answer
25 views
How to create multi-scale variables from landcover data
I have calculated raster files with values of 0 and 1 for each landcover attribute I am interested in. I would like to make multiple raster files containing different cell sizes. e.g 100m2, 500m2, ...
0
votes
2answers
852 views
Converting .tif to .asc for MaxEnt
I want to convert some .tifs to .asc to use in MaxEnt.
I have tried using both ArcGIS 10.5.1 (the "Raster to ASCII" tool) and QGIS 2.14.3 (Raster > Translate tool). Both give .asc files, but when I ...
2
votes
0answers
84 views
Points and bioclim layers plot correctly in R, but not in Maxent.jar
I am trying to use Maxent.jar. This program uses a CSV file of points and ascii bioclim layers (basically, a map of the Americas with climate data) and overlays them on top of one another.
I find ...
2
votes
1answer
100 views
Can I consider as continuous data vegetation layers on Maxent?
I would like to know if we can consider as continuous data vegetal layers when disposed on seperate different .asc files (e.g.: Barren.asc; Water.asc; Evergreen Broadleaf Trees.asc; etc.)? The data on ...
0
votes
1answer
260 views
Running MaxEnt modelling in “dismo” using “loop” and storing the results in seperate objects and folders [closed]
I am doing a MaxEnt modelling using "dismo". I am using a loop to give multiple runs. I wanted to save results from individual runs in separate objects and at the same time the results from individual ...
0
votes
1answer
857 views
java.lang.NumberFormatException: For input string: “-?”
I'm getting an error in Maxent which arises from one of the output files created by Maxent, in this case the _ASCII_novel.asc at row 159 column 444. However, the data in this position appears to be OK....
1
vote
1answer
137 views
Extracting raster values from polygon perimeters using ArcGIS Spatial Analyst?
I am currently working on a project to identify local ponds or water bodies that have high probability of species occurrence. I'm using BioClim climate data, SSURGO soil data, and a DEM layer for a ...
3
votes
1answer
425 views
How can I calculate averaged response curves for Maxent models fitted using maxnet package in R?
Could someone please point me towards an efficient approach?
plot and response.plot (maxnet package) can produce response curves for individual models, but feeding a list of model replicates, as ...
0
votes
1answer
678 views
dismo - Plotting individual predictor responses
I have a MaxEnt model implemented in dismo package. The package has the convenient function response to plot predictors' responses as the ones provided by the model html output, in R plotting style.
...
1
vote
0answers
67 views
'Spline' tool in ArcGIS Pro keeps dropping collinear points
I am trying to convert the WorldClim dataset from their original resolution of 30 arc-seconds (WGS1984) to 25m cells (OSGB British National Grid) for use in Maxent modelling.
I clipped the ...
2
votes
2answers
410 views
Translating tif rasters to asc taking a long time
I need to use the 19 WorldClim variables in MAXENT, so I have to take the .tif files to .asc files using the translate tool. It's taking forever for me (2% after 2 hours). I've given up. I know its ...
4
votes
1answer
752 views
Maxent error 'java.lang.NumberFormatException: For input string:“Z^,,,”'
I converted a shp file into asc file in QGIS. Then I tried running the Maxent with that enviromental layer and came across that error message:
java.lang.NumberFormatException: For input string:“Z^,,,”...
1
vote
0answers
90 views
rasterizing for maxent? [closed]
Im working with MAXENT and im having trouble using some shapefile files with critical variables. I rasterized the shapefiles into rasters selecting one attribute from the attribute table, but before ...
1
vote
2answers
553 views
MAXENT and shapefiles?
I'm trying to make a Potential Distribution map for an animal species that, we think, should be dependent on edaphic variables. The problem is the only maps I could find with edaphic information are ...
1
vote
1answer
166 views
Kriging predictions for presence only data with Maxent
I was doing some geostatistical analysis (variogram+kriging) for a "presence only" type data in a species distribution modeling context. Since, we know that when estimating the (empirical) variogram, ...
1
vote
0answers
45 views
Maxent and GEBCO incompatibility
I downloaded GEBCO bathymetry data and trimmed all my environmental data with ArcGIS according to my GEBCO mask, but Maxent can't run when I insert the GEBCO data. When I delete it and only run it ...
2
votes
1answer
53 views
r.maxent.lambdas command not recognized in GRASS after installing extension
Running Grass 7.0.5 on a Windows 10 machine, I installed the 'r.maxent.lambdas' addon with the g.extension command:
g.extension extension=r.maxent.lambdas
Downloading precompiled GRASS Addons ...
...
1
vote
0answers
432 views
Maxent Error reading output row and column
I need to predict geographical distribution of an insect using maxent. I have converted the bioclim data variable to ascii format to use with the collection records. After loading the files and when ...
3
votes
1answer
62 views
Making Raster of Northings (for use in Maxent) in ArcMap?
I'm working on building Maxent species distribution models for rockfish along the Northern California Coast. To do this I need rasters of predictor variables, and I want to capture latitudinal ...
0
votes
1answer
247 views
Fixing raster.asc to work with Maxent?
How to fix the raster.asc to work with Maxent?
Running Maxent with raster from WorldClim and others as Altitude, LandCover, etc. I have problems because shows up one error (have different geographic ...
0
votes
2answers
349 views
WorldClim Variables to Maxent?
I downloaded the Worldclim variables, they are in extension .adf. I want to extract by mask using ArcGis, but when I do the process the new layer is not with the same information than orginal. In fact,...
3
votes
2answers
84 views
Creating contiguous dispersal surface between two climate-change scenarios in ArcGIS for Desktop?
I'm modelling the distributions of Australian parrots in response to climate change. I have two climate scenarios (present and future), and have used Maximum Entropy modelling to generate maps of ...
3
votes
1answer
253 views
Calculating raster area by converting to points to account for latitude changes?
I am looking at a large geographic area (e.g., continental Africa). I generated a raster of modeled habitat (using MaxEnt) defined in WGS 1984 depicting the hypothetical distribution of an organism at ...
1
vote
0answers
86 views
Convert a SHP file set to a categorised ASC raster with Qgis?
I have a shapefile with regolith (soil) data that I would like to use as a categorised raster (say 007_1ASC) in Maxent.
The regolith data is in the following files:
007_1.cpg
007_1.dbf
007_1.prj
...
1
vote
0answers
164 views
How to create a distance from road raster in QGIS? (Maxent Bias)
I am trying to create a raster to show the distance from a road for an area in Australia.
I have the Open Street Map data downloaded and converted to a *.SHP file.
Is there a way to produce a raster ...
5
votes
1answer
2k views
Differences in MaxEnt between 'Biomod2' and 'Dismo' package
I am trying to run an ensemble species distribution, however the the results I am getting for MAXENT.Phillips model are not reasonable projections compared to the Random Forest and Boosted Regression ...
1
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0answers
253 views
Preparing CliMond data for Maxent
I had been working with BioClim data and that was working in Maxent. I could clip files and realign them etc.
Now I have some data from CliMond which is in two formats:
Either as text files
...
5
votes
2answers
830 views
Changing pixel size in 'asc' file using QGIS?
I have soil data and BioClim data from Australia
soil data:
rows 2200
columns 1400
pixel size 0.0025, -0.0025 255
BioClim data:
rows 660
columsn 420
pixel size 0.00833333, -0.00833333
I am ...
2
votes
0answers
131 views
Predicting map using maxent software [closed]
I am in the process of developing predicting map in MAXENT. I have current data of distribution of my trees species in tropical forest. I need to use Maxent software and Arcgis 10.3 to find the ...
1
vote
0answers
98 views
Maxent Probabilities Values
I am working on my first experiment with Maxent.
I am using two different species.
When I receive the output map and look at it in QGIS the values for suitable habitat probability do not sum to 1. ...
1
vote
2answers
334 views
How to make input data in MaxEnt with several occurences at the same coordinates?
I have insect traps data with several hundreds insects caught every day.
In this paper, authors say "Running the model using the number of mosquitoes per trap-night resulted in clustering of high ...
1
vote
1answer
516 views
Using Minimum Convex Polygon in Maxent
I am currently using Maxent to model species distribution over time using climate change data and species occurrence. I am working with three environmental variables which are all set to the same ...
1
vote
1answer
173 views
Maxent species distribution
I am in the process of developing distribution map in MAXENT. My species habitat is subset of another mammal habitat. I have distribution layer digitised for mammal species, rasterised and converted ...
2
votes
2answers
2k views
Creating spatial Reference to ASCII file
I have produced ASCII files in MaxEnt. These files are able to be loaded into Arcmap10.1 and display as an image, but I cannot interpret them or create them into a polygon for further analysis. I have ...
2
votes
0answers
227 views
Maxent output clips to minimum extent of all input variables
I am experiencing an issue with the spatial extent of my output ASC files. I am using the UK Land Cover Map (LCM) 2007 at 25 metres resolution as a categorical variable in my Maxent modelling, ...
4
votes
1answer
1k views
Using raster calculator in ModelBuilder to batch reclassify hundreds of rasters?
I'm attempting to use iterate by raster to feed all the files through a simple map algebra expression (I'm looking at data that indicates probability of salamander habitat) so I want to reclassify the ...
1
vote
0answers
115 views
Sources for meterological data with high resolution
I was running Maxent on an endemic species of andaman and nicobar.But the climate data
I have from worlclim.org ( tile number 29 ) is not of high resolution and thus I can't see the distribution ...
0
votes
0answers
577 views
Maxent out of bound error?
I selected my climate data from wordclim ( tile 29 ) and then used QGis to convert the data
to .asc format . My occurrence data is in degree decimal.But when I run Maxent on any layer
it says that the ...
2
votes
1answer
2k views
Input data to Maxent niche modelling tool?
I have following question regarding the input format of files to Maxent.
From here I downloaded the environmental layers but they are in tiff format and I guess the tool needs in asc format where ...
0
votes
1answer
355 views
List index out of bounds [-1] when making bioclimatic variables in DIVA GIS
I am working with climate data and I would like to make 19 bioclimatic variables which I can use for ecolgical niche modeling in Maxent. I am following this tutorial http://www.ccafs-climate.org/...
