Tagged Questions

Spatial database is a database that is optimized to store and query data that is related to objects in space, including points, lines and polygons.

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6answers
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How to get “.GDB” Esri File Geodatabase in QGIS for MAC OSX 10.6?

I understand there are programs like OSGeo4W that allow windows users to work with File Geodatabases, but is there something similar for Mac OSX?
16
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7answers
2k views

File Geodatabase Open API

Any ESRI boffins (insiders) know when this will be available? 2010, 2011? FINAL UPDATE now released 20th January 2011 - Can be downloaded here - ...
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votes
3answers
1k views

how to find 20 closest points efficiently

Say I want to find 20 closest business near me. My table structure is like this: BusinessID varchar(250) utf8_unicode_ci No None Browse distinct values Change Drop ...
23
votes
6answers
2k views

Options for ArcGIS Desktop SpatiaLite support?

SpatiaLite is playing an increasing role in my organization. As it stands now, using SpatiaLite alongside ArcGIS Desktop requires an amount of importing and exporting of data that isn't always ...
19
votes
6answers
475 views

Open access repository of general GIS spatial data?

As a newcomer to using GIS for research, I am wondering if there are online repositories for spatial data, similar to package repositories for Linux distributions. For instance, I would be able to ...
4
votes
1answer
299 views

Creating a table containing all filenames (and possibly metadata) in a File Geodatabase

I need to create a metadata-table for all files in a File Geodatabase or Spatial Database. It would be awesome if it were possible to automatically be updated with new filenames, and possibly even ...
7
votes
2answers
7k views

How to insert a point into postgis?

I have created one table in my Postgis. But I can not insert point. I do not know what's wrong with my query? CREATE TABLE app ( p_id INTEGER PRIMARY KEY ); SELECT ...
13
votes
5answers
6k views

Is a Country/State/City Database available?

I asked this question Stack Overflow but I was informed that I would get a better to this question here because it's not related to programming. I am creating a directory which uses locations to ...
5
votes
1answer
2k views

How to create a tables from existing tables (applying new schemas) in postgis DB?

I have a table that is geospatially enabled; that contain world borders. I want to break it down to different schemas (global, europe etc..) . My thought is to use use something that looks like this: ...
3
votes
2answers
494 views

How to read MapInfo .tab files in ArcPy?

I want to use arcpy (the ESRI install of python 2.65) to analyse tab files...can this be done directly or do I need to convert them to shp files...if so would it be possible to do something like ...
8
votes
4answers
670 views

Fastest spatial storage format?

I am wondering what storage method will result in the fastest reading of the map vectors for rendering. SHP? PostGres? SQLite? (They do not change often and I do not need spatial functions for these ...
8
votes
2answers
286 views

PostGIS (2.0?) - Native Versioning of the Datastore

I recently have been surprised to see there are not too many solutions at all discussing the best methods of versioning datastores which are made available for editing. I am looking for a robust, ...
15
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6answers
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What are the best databases for storing spatial data? Pros and Cons

A couple of days ago I installed the demo of spatialware 4.9 from MapInfo into my SQL Server 2005 install and loaded all the larger dataset into it. I was quite impressed with the performance vs the ...
13
votes
6answers
915 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 ...
27
votes
3answers
803 views

What coordinate system should be used to store geography data for celestial coordinates?

I am doing an astronomy project. I want to have the information about our images stored in a spatially enabled database. This, I would think, should be a very easy special case for GIS functions ...
9
votes
5answers
976 views

What tools are available for uploading gis data to a database?

I would like a nice graphical tool that allows me to take standard gis data such as shp files and kml files and upload them to a database such as PostGIS, MySql or Oracle. Are there any such tools? ...
3
votes
3answers
1k views

Writing a plugin for Qgis using python to access PostGIS and write geometries

Sorry about the strange title didn't really know how to word it. I currently use MapInfo to do most of my GIS work however I have recently installed PostGIS 1.5 and am really liking it so far. A ...
22
votes
7answers
608 views

GIS Software Choice for a small university research centre

I need to choose a GIS system for a small university research centre. We are handling a broad range of data, (for example, numerical tidal analyses, weather data, poverty, isolated economic activity, ...
17
votes
3answers
3k views

What is the difference between ESRI's SDE and Geospatial dbs?

When would you want to use ESRI SDE (I think it is called Server but I forget the level - please feel free to edit) versus a spatially enabled database. What are the trade-offs on either side? What ...
10
votes
3answers
843 views

What is a good taxonomy or naming convention for files and folders containing GIS data?

My company has collected about 30 TBs of GIS data over the past 8 years, and I always find myself asking the following questions: What type of data do we have for a given geographic area? What are ...
7
votes
3answers
2k views

Embedded spatial database for Java

Are there any embedded spatial databases for Java? I've come across H2 Spatial, but it was difficult to tell the status of that and if it can be used as an embedded spatial database. thanks, Jeff
8
votes
3answers
958 views

Beginner PostGIS question: getting geometry from multiple tables

I am very new to PostGIS, PostgreSQL, and SQL in general. I have 44 tables in my PostGIS database, and each one represents a different layer of vector data. Each was loaded from a separate shapefile, ...
3
votes
3answers
2k views

STDistance Unit in SQL Server 2008

I've got a SPROC in SQL Server 2008 where I'm trying to calculate the distance between a point and a polygon, and I'm getting unexpected results. I am passing a parameter (@Radius) in miles to the ...
2
votes
3answers
899 views

In a ESRI file geodatabase schema lock, what does the number after the username stand for?

I'm using the ISchemaLock interface to return schemalock info on featureclasses in a file geodatabase: // If schemalock count is >=2, then we have a problem, something else has a lock on the FC ...
16
votes
2answers
217 views

(When) should I use a GIS-enabled database?

I am a long-time programmer, new to GIS. I am trying to get a feel for the database aspects of GIS and I understand that there are some databases which are specialized for GIS use. Basically I am ...
8
votes
3answers
1k views

Where can I find free building height dataset for major cities around the world?

I am searching for building/property data which include building height, building area, lot size, and building type classifications(preferably as complete as possible). I am working on an Earthquake ...
5
votes
4answers
590 views

Given long, lat, x and y, how do I find the projection?

I am using an app called farsite that outputs shapefiles that show how forest fires will grow. I am getting output in coordinates as X and Y values rather than (lon,lat) and am looking for a ...
4
votes
2answers
479 views

Is there a performance hit from using a Feature Dataset?

I vaguely remember being taught not to use a Feature Dataset to make things "look neat" in the database, and that the Feature Dataset should only be used when there was some sort of spatial ...
2
votes
1answer
265 views

Error creating a spatial database. ERROR : could not load library “/usr/pgsql-9.1/lib/rtpostgis-2.0.so”

I am running PostgreSQL 9.1 with Postgis 2.0 on Fedora 15. When trying to install the raster support, psql -d mydb -f rtpostgis.sql -v ON_ERROR_STOP=1 I get the following error ...
0
votes
2answers
69 views

Can we use FME translator for upgrading lower version GIS database into higher version GIS database

I want to upgrdae our lower version GIS database into higher version GIS database.Is it possible to do so and suggest methods to do so.I am thinking of using FME.Is it possible to use FME or any other ...
0
votes
0answers
51 views

How to calculate sums for all fields in a table? [duplicate]

Possible Duplicate: are there any methods can choose all field and make the SUM for each fields or I must do it one by one? Are there any methods that can calculate the summary statistic ...