A high-level data model in business or for any functional area is an abstract model that documents and organizes the business data for communication between functional and technical people. It is used to show the data needed and created by business processes.

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Is it correct - according to database theory - to have a primary key in a geodatabase table, other than the OBJECTID?

I am making a data model for my geodatabase. I'm trying to wrap my head around the issue of primary keys in geodatabases, and wether or not my model is correct according to database theory. I would ...
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49 views

Choosing strategic spatial data model for Electrical Utility sector? [closed]

Is there an ideal industry standard spatial data model for an electrical utility company (and which utilities use it) that has a mix of linear & point assets or is it better to develop a custom ...
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462 views

What is a proxy entity (AcDb Zombie Entity) and how are they introduced into a file?

I am doing some transformation and translation of a few DWGs using FME desktop and I received this error, AutoCAD proxy entity type 'AcDbZombieEntity' not supported. Some preliminary research ...
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How to build an optimization model? [duplicate]

I want to make a model using QGIS. Is it possible? Then how can I develop a model. can anyone help me?
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42 views

Overview over the current activities and results to represent GeoData semantically to allow formal reasoning?

I am currently interested in representing some geo-data in a semantic way via RDF/OWL to allow formal reasoning on a geometry level. However I am lacking a good overview on the current standards to ...
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286 views

How can I always run an algorithm with standard input shapefiles from mapcanvas in QGIS 2.0.1?

I created a model in the graphical modeler and I want to run that model always with two specific polygon shapefiles from my project, e.g. pst and astenot. Whenever I run my model, it asks me to set ...
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287 views

Should 2D Positions and 3D Positions be considered conceptually different entities?

Let's suppose we want to model GeographicPositions, described by coordinates or coordinate tuples inside some Coordinate Reference System. Also, these would be put inside some sequence to represent ...
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How to best model GPS tracks for storage, visualization and analysis?

I am thinking about writing software to deal with GPS Tracks and Waypoints (mostly storing, displaying and calculating metrics such as speed, grade, and some simple statistics). I wonder what should ...
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49 views

Delete the least populated polygons

Here is the plan. I need to delete every metro's least populated census tracts (in terms of population density). To what extent? As to preserve 98% of the metro's total population. I don't know how to ...
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210 views

Sql syntax in Model builder

In ModelBuilder I am trying to perform the following query, using the select by attribute tool. I am having great difficulty with the sql syntax. What I am trying to do is Select Top 3 (Avg) Price, ...
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548 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 ...
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310 views

Where can I find a data model for land use?

Does anyone know where I can find a data model for land use? I know about data models available on Esri Support site. Are there any other resources?
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Does anyone know of a 'best practice' Seabed Survey Data Model (SSDM)?

Many of the offshore oil/gas companies are adopting an initiative from Shell for delivery of spatial data. This is called an SSDM, which is really an ESRI file geodatabase with a standardised ...