Database design is the process of specifying the logical and/or physical parts of a database.

learn more… | top users | synonyms

5
votes
1answer
78 views

Spatial+Temporal database request for 4D intersection

Here is the function I need to implement. My application deals with mobile objects with variable position and range (think of radar range). As I can't test each minute if n mobiles detect each other ...
3
votes
1answer
121 views

How to build a relational database system with 4 tables in arcgis desktop?

I have been given data from an working online application which consists of a relational model. My aim is to recreate the model using Arcgis Desktop. I have the table "elements" containing Point ...
1
vote
0answers
23 views

Designing a database for Kinect cloud data [closed]

I'm developing a navegation system with a kinect, by this moment I can obtain a cloud points(X, Y, Z, RGB), the idea is to introduce the point cloud (X,Y,Z) into a database postgreSQL with postGIS ...
1
vote
1answer
38 views

Strategies for managing (and ultimately merging) duplicate business locations in a spatial database

I am working on a project right now that involves using multiple (very large) "location directories" to identify with the highest possible inclusiveness, a diverse set of business locations. These ...
8
votes
3answers
336 views

Roadmap to creating a GIS?

Got asked that today in a job interview, I replied with the usual : Gather Data : what data do we want, do we possess it ? If not how to do we acquire it, etc. Database : after we have successfully ...
0
votes
1answer
92 views

QGIS Value Map Edit Widget with properties dependent on another field

I'm having a problems with Edit Widgets in QGIS. I'm working on a GIS Database for archaeological data, where every site is represented by a polygon. In the attributes there is a field for the era ...
3
votes
2answers
161 views

Traversing a PostGIS table tree

I'm developing a geospatial db for a company that operates at a number of large facilities. Its primary purpose is to help staff locate themselves and equipment within each facilities' multi-storey ...
6
votes
2answers
190 views

Advice in setting up foundational OSGeo enterprise GIS

First let me describe the task: My lab has approached me about setting up a simple GIS for a colleagues 'non-spatial' lab. There are a couple of key characteristics to the intended setup: Fully open ...
5
votes
1answer
119 views

Is adding a new table for every layer a good design idea?

Is it a good design idea to maintain separate tables for each layer in a PostGIS database?. Every layer is defined by users. A user creates his/her layer say ATM location. Thats meant by defined by ...
3
votes
1answer
185 views

Should I use ISO 3166-1 Numeric codes as Primary Keys for Countries in a database table?

My main concern is, will one country ever adopt a numeric code that has been used for another in the past, such as can happen with alphanumeric 3166-1 codes? If not, then it seems like a perfect ...
0
votes
2answers
130 views

creating one tree to many observations in qgis

Looking to create a database for QGIS where each point represents a tree (with name attribute) and another table of observations about each tree over time. Ideally I can update tree location in QGIS ...
3
votes
2answers
1k views

How to design a database for continents, countries, regions, cities and POIs?

I'm brand new to GIS programming and I am designing a GIS application. Target is to create system with continents, countries, regions (including states, sub-regions, provinces), cities and places in ...
2
votes
3answers
2k views

Creating unique IDs for file geodatabase using ArcGIS for Desktop?

I use ArcEditor licence level, ArcGIS 10.0 version, and we're talking about a file geodatabase. I have several feature classes (electric energy domain) and I want to connect them using relationship ...
2
votes
2answers
460 views

What's a good way store borehole data in SQLite / SpatiaLite?

I have a bunch of bores / wells with downhole data. The 'header' info for each borehole can easily go into a single table, but I'm wondering how best to store the downhole log data. Typically they are ...
0
votes
2answers
589 views

Is there a way to have a single point feature with multiple records?

Is there a way to have a single point feature and have multiple attributes records associated with it? Multipoint approach won't work as it gives me one attribute set (database row). I am trying to ...
2
votes
1answer
148 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) ...
1
vote
1answer
1k views

How to import/copy geodatabase schema from multiple tables to a single table

I have an existing ArcGIS 10 geodatabase which has a complicated schema containing multiple tables and joins, and I wish to simplify this for faster web delivery. For example, Featureclass1 is ...
13
votes
4answers
1k views

Database design: road topology in GIS

Is there a standard or a best practice way to store certain features about roads: Road directionality: One way streets: Roads going in one direction only Center Turning lanes: roads that exist ...
4
votes
4answers
391 views

Record Date and User for an edited feature

The client has a Feature Class in SDE 9.3.1. When a feature in the feature class is edited the client wants to automatically record the date/time and who edited it in the feature class attributes. ...
3
votes
1answer
447 views

Sharding of geospatial data

Reading through Rosenberg & Mateos' The Cloud at Your Service I stumbled upon the concept of database sharding. Authors point out to several advantages of such approach including high (online) ...
9
votes
2answers
938 views

How to design a Spatial Database for temporal Data?

I am working on a Weather based GIS App. I have the data from several weather stations, and this data will updated daily (by a web service). The obstacles I am facing are: There are currently 40 ...
10
votes
1answer
395 views

Is it possible to maintain primary keys on versioned featureclasses without arcobjects code?

Since it is not a good idea to use ObjectIDs as primary keys in relationships, some other column will need to be used. Is it possible to use DBMS sequences to populate primary key columns in ...
11
votes
2answers
742 views

When is it safe to use ObjectIDs as keys in a relationship class?

I've always avoided using ObjectIDs when defining relationship classes. It is my understanding that some actions on a geodatabase will re-set objectIDs (like import/export). However I do see a lot ...
13
votes
6answers
1k views

Is good database design less important for a spatial database

I have a strong feeling that database design and normalisation often comes in second hand when dealing with spatial data. With software costing a fortune and databases with over 100 fields tables I ...