A methodology or set of analytical procedures used to derive information about spatial relationships between geographic phenomena.

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7
votes
1answer
402 views

Looking for examples of bayesian modelling and smoothing in a GIS

I am looking to assemble clear examples of Bayesian modelling / smoothing in a GIS. I have yet to see GIS being used to conduct Bayesian style analytical models and would like to see what is currently ...
3
votes
2answers
652 views

Land Administration Domain Model example implementations

Does anybody know of a sample implementation? I am currently trying to adapt it to my country but the LADM is rather abstract. Anybody have any idea how to go about this?
15
votes
6answers
2k views

What are some 3D visualisation tools that successfully work with GIS data?

There are a large number of 3d modelling tools available (both open and closed source). I would like to be able to: Import GIS data into a 3d environment and retain georeferenceing. Retain the ...
3
votes
1answer
383 views

Enterprise Architect - domains relationship

I am not sure if this forum is right place to ask but let me try. I am building an ArcGIS model in Enterprise Architect. I have a couple domains inside. The problem is: I want to make the following ...
2
votes
0answers
222 views

Incorporating known GPS/INS data to automatically produce geo-registered 3D models

I am trying to reconstruct a 3D building model from 2D video frames using an open-source Structure-From-Motion(SFM) software (Bundler). The final reconstructed 3D model will be in Cartesian ...
3
votes
1answer
314 views

Looking for Fortran code calculating drainage basin area

I am working in a project of glacier mass balance. For my project I want to integrate the area of the drainage basin in a glaciological system model (GSM). As the drainage area changes with time due ...
10
votes
2answers
429 views

Ocean flow models - predict the path of an object dropped in the ocean

This question is from a user who wants to calculate the predicted path of a bottle dropped from a ship. He has a spreadsheet of hundreds of these bottles and wishes to display the predicted vs actual ...
2
votes
1answer
155 views

Attributes that characterize a geodetic track

I need a way to index and retrieve a large amount of track data. To do this I need to derive from every track as many attributes as I can. For now, I derive Name Tortuosity Speed (average, max) ...
6
votes
5answers
3k views

3D subsurface modelling

I am a student and initiating a thesis project for MS specialize degree in geophysics. I am working on tectono - stratigraphy of some area and want to do the 3D subsurface modelling of the same area ...
1
vote
1answer
467 views

Issues Merging in Model Builder after Running Script

I have multiple inputs running through various processes throughout my model. At the end of these processes they are all merged together and output into one final feature class. This was working fine ...
1
vote
3answers
2k views

Calculate XY Coordinate with “CalculateField” tool

I used model builder to build a model which can calculate the XY coordinates and it's perfect! However, when I export it to VBscript and run it in VBA it crashes.... The error happens at ...
7
votes
1answer
839 views

Open source location allocation modelling

I'm looking for open source tools for location allocation modelling (eg planning public health facilities). Preferably in a GIS environment. I know GRASS somewhat, but v.net.alloc doesn't seem to ...
16
votes
3answers
537 views

Lightsquared GPS controversy: Where is the analysis?

GPS World reports that Lightsquared's network of 40,000 transmitters will interfere with GPS signals. Initial technical analyses have shown that the distant, low-powered GPS signals would ...
3
votes
1answer
346 views

Displaying 3D subsoil models in ArcScene

I was wondering if anybody had any ideas on how to display a 3D subsoil model in arcscene? The data we will have will be exported from rockworks in point form - and then we need to convert it to - ...
12
votes
5answers
3k views

Where are the radiation models for Japan catastrophe?

I'm interested in seeing authoritative model results showing how radioactive contaminants from Japan might circulate through wind and water. The AGU blog points out this bad model, but in skimming ...
12
votes
1answer
2k views

Open-source GIS implementation of the Huff model

This might be a stretch, but I was wondering if anyone implemented gravity modeling tools or scripts for Retail Market Analysis (like the Huff Model), to analyze spatial data for customer-store ...
3
votes
1answer
188 views

Get points in point file to write into new field the census tract each is in (from another shapefile)

I have points that represent day care centers which have address and lat-long. I am using lat-long to display. Now I need to sort, count, etc. these points in conjunction with new census data. To be ...
12
votes
3answers
577 views

Modelling of rent prices - which interpolation method to use?

I have national dataset of ~1,4 million households. There I have information about rent, size (number of rooms and m2) and some additional characteristics of each household. I'd like to use this data ...
15
votes
3answers
1k views

Is there a CASE Tool for modelling spatial databases?

Does anyone knows if there is a CASE Tool that would be possible for modelling spatial tables? I need to create a model and export it to SQL or a database directly. I´m using PostGIS. Thanks in ...
16
votes
4answers
646 views

How to handle TIME in GIS?

Is there any way or any idea on how to handle Time attribute in GIS? For example, which are the ways to specify that an object is at a place at a given time interval and them it is in another place ...
12
votes
3answers
317 views

What practices are available for modelling land suitability?

I currently use a "classic" raster based approach of dividing a study area into cells. All input layers are converted to rasters at the same cell resolution and given a suitability rating. A final ...
4
votes
2answers
1k views

compound variables in model builder?

I'm trying to create a model wherein one of the parameters is a compound variable, that is made of multiple variables joined together. How can this be done? For Example: Create an insider buffer ...
8
votes
6answers
1k views

seeking “Available Sky” implementations

I'm looking for implementations of an algorithm called "Available Sky". ArcGIS (Spatial Analyst or GRID) is preferred, but solutions in GDAL, SAGA GIS or others are perfectly acceptable. The ...