Questions tagged [model]
representation of an object
101
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19
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Create canopy digital surface model [closed]
I want to use UMEP in QGIS. I created a DSM (digital surface model) but now I need a CDSM (canopy digital surface model). I have the coordinates and heights of all the trees but I don't know how to ...
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1
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0
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21
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QGIS - How can I get the name of the source algorithm in a model script?
I'm trying to write a simple model script that accepts the result of a JOIN algorithm and I need to get the name of the source algorithm that feeds my script.
My goal is to create a summary of ...
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1
vote
1
answer
24
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Automatic / Parametric Grid generation across multiple polygons in QGIS
I have a following problem:
I have a layer with numerous polygons inside (Over 400). I need to generate grids inside every polygon.
When using the Grid process over a layer, the generated grid covers ...
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0
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0
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8
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Model to Web Tool geoprocessing issues
I have been trying to troubleshoot some custom geoprocessing tools for a work project. The end goal is to let users query crime data depending on the year and what the offense was, the output is block ...
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1
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1
answer
37
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Object not found in R
I made a model (mod1) using variables from my data but when I try to use that model to make a prediction I get the error message "object 'gop' not found".
mod2 <- stan_glm(filisave ~ gop +...
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1
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1
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30
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Using combine function in QGIS modeler
I am trying to use the QGIS modeler with the 'combine' function, but when I run the model, it only gives me one choice of shapefile to choose instead of letting me choose more than one raster to ...
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1
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0
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26
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Running multiple models within a Toolbox (.tbx) with 1 python script
I am trying to run over 80 models between 2 toolboxes. I know I can list them out to run them (example #2) but is there a way to iterate/loop through each model and run them one at a time without ...
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-2
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1
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367
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How to save Random forest classifier within GEE that can be called later for classification
var classifier_serialized = ee.Serializer.toJSON(classifier)
Export.table.toAsset(ee.FeatureCollection(empty_feature.set('classifier',json)),desc,AssetName)
// Load using this
var json = ee.String(ee....
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1
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1
answer
23
views
Retrieve scale-value of a specific map in specific print-layout for using this scale in model-builder
I made a model with the model-builder which create a grid with its height- and width-size dependend on the size of a certain map in a certain print-layout. It allready works fine.
But that for I need ...
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5
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CORDEX and CanRCM4 data lapse rate
I am using CanCRM4 data from the CORDEX model for modelling ice cap mass balance. I was wondering if anyone had any information about the type of lapse rate used in this data set and if it can be ...
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24
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R predict() a future table value in a time series
I have tree canopy information measured for 5 trees over 4 dates in the following CSV:
treeID,X,Y,Z,area,date
1278,888260,936944,58.8,40.7,2021-09-22
1278,888262,936940,53.6,66.3,2021-10-15
1278,...
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1
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31
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Climate prediction using Climate Change Agriculture and Food Security (CCAFS)- Climate Analogues
I would like to know which climate model I can use to predict future climate of a particular area and at the same time shows places with similar conditions at the present. CAFFS-Climate Analogue tool ...
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12
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Graphical Modeler Algorithm Not Functioning for Reproject (warp) - Passing Through This Step
I have a reprojection problem in my modeler. The input appears to be failing and continues with the default layer's projection.
[Polygon input] -> shared CRS input - reproject
[DEM/Raster] -> ...
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2
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0
answers
62
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Preventing output from being overwritten using QGIS Model Designer)
I have built a (simple) Processing Model with the Qgis Modeler.
But I can't figure out how I can prevent the output from being overwritten.
In this case (see pic), my last process is "Add ...
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1
answer
173
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Speeding up QGIS Processing
My QGIS processing is pretty slow. Even using "fill sinks (wang & liu)" or "r.fill.dir" takes many hours to finish even though I use a "Intel(R) Xeon(R) Gold 6258R CPU @ 2....
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1
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34
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Tracing back single class sample sizes of a random forest classification model (.pkl-file) [QGIS 3.16 - EnMAP Box - RFC]
A couple of weeks ago, I created some prediction models with the EnMAP Box Classification Workflow.
In some of the models I reduced the sample size for some classes as shown in the image below. Here, ...
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3
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1
answer
112
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Adding field containing expression from the Calculator field after executed model/script
I tried to use the refactor field processing after my model creates the two layers needed to calculate the expression:
line_locate_point(geometry:=geometry(get_feature('LH_fusion', 'id', '1')), point:=...
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3
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0
answers
58
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Model designer: raster processing with high compression
I am new to QGIS, please excuse my probably very easy question to which I couldnt find an easy solution:
I have many folders with each 9 raster files with different resolution (0.5 m - 2 m). In every ...
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0
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92
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Estimate cross-covariance of seasonality (NDVI) and precipitation data with a harmonic regression model then visualize a chart from the model
The challenge is to estimate cross-covariance of seasonality (NDVI) and 30-day precipitation with a harmonic model. I added the UCSB CHIRPS rainfall data as bands to all available Landsat 8 imagery ...
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61
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Create an outline based on density of raster
I have a classified aerial image of small vegetation that is separated enough by ground that it is not overlapping each other. After the classification process (dzetsaka), I removed all the other ...
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1
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491
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Iterate a model with Python
I have a model that works well but I can't iterate with a batch process. Therefore, I would like to use a python script to iterate to avoid repetitive tasks.
I want iterate my model (that I have ...
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1
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55
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Convert "Get Raster Properties" output to long
I am building a model in ArcGIS (10.7.1) and I would like to use the maximum value of a raster as the "number of output zones" input to the Slice function. I used the Get Raster Properties tool to ...
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25
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How to export ArcMap model parameters to an Excel file?
I have a model where the user inserts different model parameters like "Name", "Elevation", "Threshold A", "Threshold B" and so on. Based on this, features get selected, saved to .xls files where they ...
3
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249
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Cannot use raster layers not defined as inputs in a model in QGIS 3.x
I have a problem in building raster models: both with QGIS 3.4.5 and QGIS 3.10.3, the raster calculator algorithm, used in a model, refuses to work if the requested layers are other than the defined ...
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1
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1
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171
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Euclidean Distance in Model Builder error
I'm trying to use Model Builder to create Euclidean Distance raster files for a set of line features.
Each line also have a buffer polygon that corresponds to each line that I want to have as an ...
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1
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1
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175
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Output of an algorithm in QGIS Graphic Modeler
I use two Processing tools in a graphic Model in QGIS:
1-Select by Location
2-Select by Attribute
The problem is that I can't get the output of the selection by location so that I can't use it as ...
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1
vote
1
answer
699
views
spplot doesn´t work - sppanel error
I have this code (below) for plotting some information in a map, but it doesn't work, in the map appear only the error "sppanel", why I solve that?
library(GWmodel)
library(RColorBrewer)
data(...
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0
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97
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Clipping DEM model in QGIS?
I have created a model that takes a point layer that contains elevation data, then interpolate it using TIN and then clip the results according to shapefile.
The problem is that the model works and ...
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231
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What are the formulas used in SAGA Ordinary Kriging?
can some one name the formulas avaible in the Ordinary Kriging Modul of SAGA:
What ist the exponential, spherical, Gaussian-Model, etc.?
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42
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ArcMap tool for for mapping and measuring methane, considering variable parameters
I have data on 70 methane-emitting plants. For each plant I have the average data of temperature and precipitation between the years 2000-2014. In addition, each plant also has relative humidity, wind ...
2
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3
answers
285
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Understanding GTFS static data relationships?
I'm trying to build a data store for the GFTS static data, but can't get my head around the relationships between Route, Stop, Stop_Times and Trips.
e.g.
Route 2E runs between airport and city centre.
...
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615
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Loading collada into 3D view of QGIS using Qgis2ThreeJs Plugin?
I have been looking at documentation and other posts but cannot find a way to load a 3D model into QGIS.
I Installed the qgis2ThreeJs Plugin.
I have tried to load a collada file in a temporary ...
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2
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0
answers
43
views
Is there an existing solution for pattern recognition?
I've been looking at modeling potential avalanche hazard based on terrain characteristics. I have a vector layer showing historical avalanche paths and have raster layers for elevation, aspect, slope,...
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46
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ArcGIS Modelbuilder model clogs up memory?
I have a model in which a zonal histogram is computed of each line in a feature class, showing the amount of cells each line intersects in a raster file. After this, this column is joined to a table ...
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1
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1
answer
315
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Run CAR model (CARBayes package) with zip (a zero-inflated Poisson) family in R
I am trying to run the function "S.CARBym" using a zero-inflated Poisson (zip) family because my data y (cases of a disease) has too many zeros. I couldn't run it because the function asks to specify ...
4
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1
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96
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Seeking algorithms for DEM generation? [closed]
What are the different algorithms employed for the generation of a Digital elevation model from images captured using an unmanned aerial vehicle ?
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1
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264
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How to Create SCS (now NRCS) Curve Number Grid using GIS with European map (ESDAC dataset)?
After finishing the watershed delineation, and after creating the HMS schematic in Arcmap, i was trying to include the land use map and soil map in the process, by using the CNgrid preparation by ...
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0
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168
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Model builder generating empty output
In the model below, I get an empty output if I run it from start to finish. It works though if I first individually run the project and create fishnet tools, then run the entire model. Something is ...
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1
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1
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117
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Disaggregating NetCDF in ArcMap?
I have many netcdf files in one folder. I want to extract variables from each netcdf file and save them as another .nc file.
The process is like this:
Make NetCDF Raster layer (one .nc)
Define name, ...
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2
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1
answer
78
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Problem with number entry QGIS modeler
i created some number entry in QGIS modeler
I created them specifically for them to be decimal numbers and not integer.
But when i try my model, when i put a decimal number like 0.255 the value ...
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9
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1
answer
1k
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Accessing "Save Vector Layer As" algorithm in QGIS Processing Model?
I'm building a Processing Model in QGIS that ultimately exports a points shapefile (vector layer) as a CSV in a different coordinate system than the shapefile.
I ordinarily accomplish this in the "...
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1
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913
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Creating a 3D model of a pond using GPS coordinates and associated depth measurements
There is a pond which I am trying to create a 3D model of to view the depth. We have measured the depth every few meters along straight line transects all across the pond, and have GPS coordinates for ...
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220
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Running Leroux model in WinBUGs
This may be a long shot, but I have been given some WinBUGs code to run a model with a Leroux prior. I'm interested in 'fixing' the precisions for Leroux prior and the intercept term in this model. ...
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5
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1
answer
182
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Ignoring multi-collinearity in spatial stepwise regression modeling?
We have used multi-linear regression (stepwise) approach to perform spatial modeling with parameters derived from Remote Sensing data. The outcome of the statistically significant components produce ...
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2
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3k
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How to create 2D or 3D cross sections from geological borehole data in QGIS
Is it possible to load borehole csv data that contains x, y, z coordinates into QGIS and create cross sections of the strata? It is data along a rail line so a DEM is not suitable. Just a 2D cross ...
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3
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1
answer
3k
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Using AddJoin in ArcPy?
I'm trying to join 8000+ daily rain tables to one climatic stations shape. The goal is to get 8000+ daily rain point features. I used to work with the next arcgis model, but now i'm trying to put it ...
4
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1
answer
69
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Modifying number of features in Merge tool each simulation run of ModelBuilder?
I am relatively new to ModelBuilder and null in python. I want to include Merge tool in my model. However:
at run 1, I want to Merge shapefiles s1 and s2
at run 2, I want to
Merge shapefiles s1, s2 ...
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5
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1
answer
2k
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Importing COLLADA Models into QGIS
QGIS 2.18.5
I'm using Qgis2threejs to put this COLLADA model ontop of a point (open in IE, not chrome). You see how the web-preview animates perfectly and the blades are centred on the hub. When ...
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102
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ISA Model and GFS data
I have a newbie question...
I always used the International Standard Atmosphere model whenever I needed to calculate the temperature in a given altitude.
It always looked accurate to me...
However,...
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4
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1
answer
3k
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DTM extraction of tree heights
I need to classify tree heights in a DSM of a slope-y terrain. It´s not a forest but several individual / detached trees. In a plane terrain it won´t be an issue but in that uneven terrain I need ...
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