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

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1answer
427 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 ...
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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 ...
6
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1answer
690 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 ...
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3answers
529 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
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1answer
313 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 - ...
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5answers
2k 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
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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
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1answer
182 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 ...
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3answers
520 views

Modelling of rent prices - which interpolation method should I choose?

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 ...
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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
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4answers
602 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
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3answers
286 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
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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 ...
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7answers
908 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 ...