Questions tagged [simulation]

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Generate unconditional simulations with same nugget, sill, and range

I am a newbie with gstat and unconditional simulations. As I understand, unconditional simulations should have the same nugget, psill, and range, but they do not (except nugget) when I use gstat in R. ...
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Systems dynamics modeling using ArcGIS Pro

Is there a way to run biogeochemistry simulation models in ArcGIS Pro, where a loop represents the processes occurring in a time step, and the output values from one time step are used as input for ...
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1 answer
214 views

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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Alignment of raster files(.tif)

I have 5 different .tif files and all of them have the same bounding box(same starting and ending coordinates), but the number of rows/columns are different in each one of them. I want to make the ...
-1 votes
1 answer
391 views

OSError: [Errno 13] Permission denied: 'restart/snapshot_Quad9_p0000_i00001124.xmf'

I had fix the code before, but now it got me error like this. I didn't know what's this mean Titan2D v4.0.0 Traceback (most recent call last): File "simulation.py", line 83, in <module&...
1 vote
1 answer
149 views

SyntaxError: non-keyword arg after keyword arg python [closed]

I'am working a project about hot clouds volcano mountain simulation with Titan2D v4.0.0 but I got error when I try to run the simulation.py sim.setGIS( gis_format='GIS_GRASS', gis_main='/home/...
1 vote
1 answer
164 views

Convert shapefile data to NMEA - simulate NMEA positions from shape data

To generate waypoints to be read by the agricultural GNSS-RTK-steering system CEREA, I am looking for a way to simulate NMEA strings of a GNSS receiver by clicking the edges of the boundaries of ...
1 vote
1 answer
128 views

What is the best way to create a line of sight simulation raster? [closed]

I have been tasked to create some sight-line simulations for a powerline project. I have several (85) observation points and need to create a simulation of what the view would look like, looking from ...
1 vote
0 answers
33 views

Satellite moving target tracking simulation

I am trying to create a Simulation of an earth-pointing satellite. The satellite should track a moving target on the ground via an on-board camera. How can I calculate the goal attitude of the ...
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82 views

Creating post landslide simulation using ArcScene?

How do I create a simulation for post landslide with ArcScene? It should able to show xyz plus velocity and thickness of debris at different time.
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2 votes
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119 views

Run Schelling's model of segregation on a geographical map instead of the matplotlib plot or grid

If you don't know what is Schelling's model of segregation, you can read it here. I have written the following code to run the Schelling's model of segregation simulation. import matplotlib.pyplot ...
0 votes
0 answers
256 views

population density "hotspots" within ZCTA

With the available census tables (county, tract, block, zcta) and shapefiles, is it possible to identify "hotspots" of population concentration within a ZCTA? The ZCTA gazeteer file provides the ...
3 votes
1 answer
1k views

Add variables to an existing netCDF file in R

I have a netCDF file with one variable 'gpwcount' and its lat/lot coordinates also available. The dimension of this 'gpwcount' variable is 1050 rows x 1050 columns. This file consists of population ...
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1 vote
3 answers
118 views

Simulate random error on data with pyqgis

I am developing a small tool to complement GPS data with mutual distances, and I need to simulate some input data. So I thought I would introduce a normally distributed error on the (known) positions, ...
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2 votes
0 answers
179 views

Choosing diffusion coefficient and other parameters for r.sim.water in GRASS7?

I'm trying to run r.sim.water in GRASS7 to simulate overland flow during a heavy rain event. My DEM has a resolution of 1m. I prepared it by adding values for buildings and included ditches and ...
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2 votes
1 answer
674 views

Generate sample (Gaussian distribution) and store simulations in raster stack in R

I have a raster stack, one of the raster layers is the mean prediction of a property for that pixel, the second layer is the variance of the prediction. I would like to write a function for ...
1 vote
1 answer
307 views

Create repeating pattern of raster or polygons in ArcGIS

I want to create a repeating pattern of raster OR polygon features based on an existing sample, so that the sample fills up a larger area in a repeating pattern. For example, with a sample of 10x10 ...
3 votes
0 answers
493 views

Testing tools to simulate user map browsing / stress test tile server?

are there any online/offline tools that would simulate user map browsing behavior, possibly concentrating on certain areas or random? I am trying to stress test a tile server.
1 vote
0 answers
865 views

Problem in running r.sim.water

I am trying to run the r.sim.water in GRASS. I have calculated the partial derivatives dx and dy rater map using r.slope.aspect. I am using this elevation map [1] to get the time-series depth map. But ...
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1 vote
0 answers
473 views

Simulate water runoff to get water height over each pixel of DEM

Here is my problem that I am trying to deal with. I have given a height map of around 512X512 resolution(It is Geo-referenced and I have the meta-data for this). And I have given that this area ...
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3 votes
1 answer
427 views

Using OpenStreetMap for simulation of commuter routes? [closed]

I'm seeking some advice on how to build a simulation based on OpenStreetMap Data for my masterthesis. My knowledge of spatial data is very limited, since I come from another field of science, namely ...
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2 votes
3 answers
1k views

Creating a simulation of how people moving around a site

I am working on a project aiming to create a geographic simulation for how people interact around a site. Situation: There are x people in an enclosed area (such as a zoo). There are y locations to ...
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0 votes
1 answer
548 views

Is MATSim useful tool for Taxi fleet simulation?

I am working on a university project and I seek some advice: My project consists in modeling the taxi fleet of a major city and investigating if replacing a percentage of the fleet with electric ...
0 votes
1 answer
142 views

Changing slopes derived from DEM using ArcGIS Desktop? [closed]

I have a DEM for a region over which I want to simulate an ecological process. I would like to run several simulations for the same region but I want to alter the topography for the simulations. ...
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3 votes
0 answers
550 views

Agent Analyst extension for ArcGIS [closed]

I am trying to create agent based model for simulating movement of occupants in different rooms of different floors of a building. I am using Agent Analyst tutorial downloaded from ESRI website and ...
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2 votes
3 answers
1k views

I have n points, how do I find the closest one from a point p by road?

I'm currently working on a map with stores and clients. I want to find the closest store by road from a given client, with the aim of simulating the creation of a new store. Requirements: ...
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2 votes
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326 views

How to create the fuel models & live fuel moisture rasters for Wildfire simulation?

Has anybody done wildfire modelling in GRASS? Where could I obtain / how do I create the fuel models and live fuel moisture rasters to determine rate of spread (r.ros)?
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17 votes
2 answers
882 views

Is there a standard data model for storing traffic volumes, layout, lanes, timing and phasing information?

I am at a crossroads where I want to store more than a scenarios worth of project data from a Synchro study, but do not want to keep this data in a series of text files. The data output by Synchro is ...
7 votes
1 answer
1k views

Simulating moving vehicles using ArcPy? [closed]

I have a point layer (stored in SQL Server 2008) that is being served up by a map service in ArcGIS Server 10.1. I am consuming this service in a web client. Lets say the points are boats out at ...
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7 votes
1 answer
2k views

Seeking GIS tools for simulating landscape fragmentation?

I am currently looking for any GIS packages (or add-ons) that allow the simulation of landscape fragmentation on raster data. Maybe also other software than GIS tools? Does anyone of you have had ...
4 votes
2 answers
1k views

Creating network simulation / temporal models for videos? [closed]

I know of ArcGIS Tracking analyst and QGIS Time Manager. I have a transportation network with time based schedule for buses. I will create time aware shapefiles from this data. Is it possible to ...
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17 votes
1 answer
2k views

Monte Carlo simulation using QGIS and pgRouting on optimal sidewalk construction

I am new to spatial analysis and would appreciate some general direction on a project I am attempting, outlined below (I am starting from scratch). GOAL: To find the best locations to install 2000 ...
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4 votes
1 answer
2k views

Simulation envelopes and significance levels

Many spatial analysis packages provide Monte Carlo techniques to simulate upper and lower “envelopes” for a summary statistic as a function of distance (e.g. K-function, nearest neighbor, etc…). I’...
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1 vote
1 answer
1k views

Is there any pseudocode for MFD (multiple flow direction) algorithm available?

Still stuck with the simulation system, is there any good pseudocode for the multiple flow direction (MFD) algorithm? I read a pseudocode example and implemented it, however the simulation was linear: ...
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2 votes
1 answer
1k views

How to use GRASS with HEC-RAS?

I am trying to use HEC-RAS for the flood modelling of my flood simulation. How do I use the text file output of HEC-RAS with the GRASS script r.inund.fluv?
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