Acronym for Structured Query Language. A syntax for retrieving and manipulating data from a relational database.

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How to determine distances of points from closest line? (Mapinfo or QGIS) [duplicate]

I have a set of points and a set of lines. I'd like to know distances of the points from the closest line... answering the question "how many points are within 500m to 1000m of one of the lines, how ...
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130 views

How to Build Query Table from two OLE DB tables using ArcPy?

When I run the following code to create a subset of a table, the error says "An invalid SQL statement was used" [Query]. The error shows in line 39. Is there any idea you can figure this out? import ...
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305 views

PyQGIS Dialog Plugin not resetting

I have written a PostGIS search plugin that works pretty well, except two things that I just cannot figure out a solution 1) When the dialog closes and then is reopened the previous query is still in ...
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46 views

Is it possible to retrieve lost versioned data in SQL Server Management Studio?

One of my staff accidentally deleted a feature class she was creating in her version before I reconciled it. I have grabbed a back up of the database from yesterday in SQL Management Studio. Is ...
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1answer
125 views

Rewrite query to match two points with a linestring in a different database table

OK, not sure if I've worded the title brilliantly, but here goes: Suppose I have: a table "gps_nodes" containing columns: "EASTING" (containing longitude data) "NORTHING" (containing latitude ...
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65 views

Selecting a bounded area within a raster

I am new to postgresql. I have imported a 256kb sample raster (.tiff) into postgres with tilesize 100x100. Now I need to select the area (rectangle) from the center of the image using sql query. Then ...
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1answer
488 views

Using sql SELECT DISTINCT in Fusion Tables API

How do I go about using sql SELECT DISTINCT in fusion tables API?
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2answers
169 views

SQL: Select aggregated Bounding Box of multiple Features

I would like to calculate the aggregated bounding box of multiple features using OGC Simple Feature SQL or SQL API of ArcSDE. The following statement will only query the bounding box of each feature: ...
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57 views

How do I make vectorlayer with sql on PostGis via python code

I need to make a vectorLayer and fill with the SQL's results on PostGIS via python code. I'm working with python 2.7, QGIS 1.8 and PyQt 4.5 How do I it ? thanks
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75 views

IQueryDescription SQL Query Returning Limited Records

I created a SQL query that is working in SQL Management Studio, but as soon as I transfer the query into ArcMap's IQueryDescription to try and run it with a User Form, the results that I'm getting ...
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71 views

How do I prevent Arcmap from verifying SQL expressions when using a plugin dataset?

I've written a plugin workspace for ArcGIS. I'm able to compose a where clause containing syntax that my implementation of IPluginDatasetHelper understands, assign it to IQueryFilter.Whereclause, and ...
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49 views

given sets of vehicle passing on each edge, how to get most used vehicle to avoid transition?

I have two tables: one, the resulting table from converting osm.xml via osm2po so I can use pgRouting, and another one that contains information on what edges each public vehicle passes through ...
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3k views

How to populate data from postgresql using dynamic php\html listing

In the form I created, I need two fields to be dynamically populated from the database while the other fields will be manually entered and push to the database. I have written a script that is able ...
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74 views

Database has duplicate values after running pgrouting

I am a newbie with postgresql and sql statements so maybe it is a trivial question, I'm sorry for that. I am working on a postgis database and try to use the pgrouting function. My goal is to store ...
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107 views

How to find loops in a network

I am a new in this field and need help, how to code using SQL spatial a function that retrieve loops in a network.The input, flag: Geography and barrier: Geography and two spatial tables, first ...
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143 views

Acceptable Reduce() amounts for google maps zoom levels?

I'm using SQL Server Spatial to return large polygons to Google Maps for display. Given that google maps has a zoom scale of 1 - 20, I would like to reduce my polygons (reduce function uses the ...
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362 views

Add building height from xyz points in PostGIS

I have been trying to get this query right and just can' seem to. I have a building polygon table with over 7 million polygons, indexed I then have a grided height XYZ table with attribute 'height' ...
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307 views

Manifold 'Link drawing to query' - can I do this in QGIS?

Manifold GIS allows the creation of dynamic drawings linked to queries. Unfortunately I do not have access to Manifold as my employer refuses to pay for it, so am currently investigating ...
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1answer
373 views

How to correctly use cursor.execute() with PostGIS?

I do not understand how the operator works some times... Here is an example that works, "SELECT ST_Distance(ST_GeomFromText('POINT(-3.16496271127842 ...
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315 views

T-SQL with SDE and Web Map ArcGIS Server 10 MSSQL 2008

I need to build a system whereby the user of a web map (the standard web map that ArcGIS Server Manager builds) can edit a feature class's attributes. The attribute will be a 'Comments' field. The ...
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229 views

Color polygons using SQL Database based Rules in Openlayers

I want the rules to be applied according to values in a database. Is it possible to include external database information that is not in the shapefile? In spoken words the original rule is "Color all ...
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4answers
2k views

What is a SQL Query to all values in a column with Select by Attribute in ArcGIS? [closed]

I would like to select all values for an attribute using select layer by attribute to use in model builder and hopefully save the expression for automation purposes. If I have an attribute named ...
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2answers
289 views

How to use cartodb.js without storing sql in javascript

Using cartodb.js, how can I change the layer definition without building the sql dynamically in javascript and passing it as a parameter. Aside from revealing my table structure (not a huge deal at ...
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1answer
96 views

SQL and ArcGIS data querying: what's the difference?

I am wondering if the language used by ArcGIS for data querying (e.g., search by attribute) is part of the SQL language, or to what extent there is a connection between the two (and where does it come ...
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1answer
152 views

Creating geometry from lat/lon in table using PostGIS?

I have a table with over 800,000 records including a lat and long column. The data source did not create geometries, so I was looking around how to do this. I know there's ST_MakePoint(x,y,SRID) but ...
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3answers
708 views

AVG and GROUP BY in ArcMap

I have a Road Network shp file.(attributes include Names and Volumes ) Each road in my network consists of many links with the same name and different volumes. I want to display Road Names and ...
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2answers
112 views

How can I optimize this point-linking query?

I have the following query, and am wondering how it could be optimised to run faster: WITH gps_nodes_1 AS ( SELECT "NODE_ID", "geog" FROM gps_nodes WHERE ST_Distance("geog",ST_GeogFromText('POINT( ...
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1answer
161 views

How to cut/split multipolygon with blade (linestring) into two pieces using PostGIS? [closed]

I struggle to do split operation in postgis I tried to build a query but Im always fail. Id like to cut a multipoligon with a blade (a linestring) into two pieces. These two objects have specific ...
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2answers
315 views

oracle search against intersect of a region that covers the whole world doesnt find any records

I am new to Oracle Spatial, I am trying to implement a service that will take coordinates from a map, and search our database to find any geometries that intersect with that map view. I works fine for ...
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2answers
2k views

Cannot insert simple geometry data

I installed PostgreSQL 9.2.4 and PostGIS 2.0.3 on my Windows 8 machine. Then I created a table using phpPgAdmin and added a geometry column using the following statement. SELECT ...
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1answer
584 views

Defining SQL 2008 store within GeoServer 2.3

I want to define a SQL server 2008 store within Geoserver 2.3. I installed the sql Extension. After defining the different attributes, I get the following error message : Error creating data store, ...
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1answer
278 views

Vertex point is returning None

I have this multilinestring that has 48 NPoints. When I execute ST_PointN(line,5) it returns none. And to continue on, it returns None for everything after index:2 up to index:48. This is how my line ...
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2answers
1k views

Mysterious MapInfo query syntax errors

I'm struggling to get what seems like a perfectly normal query to execute in MapInfo v10. In SQLite Manager (an excellent firefox plugin), this works as expected: SELECT area_name, street_name, ...
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2answers
76 views

Using SQL query with ArcPy?

I'm creating a tool that when you type in the city name it will select the city, zoom in and label it. I have the zoom and label working but can't figure out the SQL Query needed to select the city I ...
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2answers
85 views

Feature class SQL Query combining ANDs and ORs

I want to create a query that returns any combination of specific values of two different attributes. I have a feature class that has first field with values A through E and a second one that goes ...
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1answer
1k views

MapInfo Calculating the number of Points that Fall within a Boundary

I have two layers in MapInfo (points and polygons). I need to select points which fall within polygons where the income > 1500 I tryed this one but not working: ...
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1answer
291 views

selecting elements of a specific geometry type in PostgresSQL/PostGIS

I was reading a postgis tutorial and noticed that unlike working with shapefiles, one can actually store different types of geometry in postgres. In a table created with multiple geometry types, the ...
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3answers
1k views

How do I reformat numbers to only show a certain number of significant digits in CartoDB?

I need to round numbers that are in my table in CartoDB, so that in the Map visualization infowindows I only show results to two decimal digits rather than the long decimals that are currently ...
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2answers
576 views

How to join data in postgis tables to form layer with subset of attributes

In QGIS I am trying to join data from two postgis tables. I can not figure out how to do this at sql because add layer tools seem to allow one to select just one table to filter on. Instead I ...
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2answers
130 views

sql query to get origins and destinations

I have a table of cities with an ID and geometry (200K rows) and a table of travels, with only two ID: idfrom, idto (7K rows) I'm wondering how could I select the geometries for each one in order to ...
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1answer
115 views

Looping on the Select_analysis tool

Im trying to perform a loop on the Select_Analysis tool in Arcgis. Code looks like this: inputfile = open("locality.txt", 'r') # locality.txt is a txt file of locality names loc_list = [] for line in ...
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1answer
2k views

query syntax to select every multiple of nn record (shapefile) [duplicate]

I have data like multiples of 40. 40 80 120 160 200 and so on. I would like to label every record that is a multiple of 100. I have tried a couple of methods and cant get them to work either as a ...
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2answers
38 views

MapBasic - Updating blank rows in column with the value above

I am writing a MapBasic tool to correct some incorrect values in a set of tables. So far I have managed to pull out the values I need in a new column: What I need is to update any blank rows in the ...
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1answer
46 views

CartoDB - PostgreSQL row_number() using PostGIS ST_Distance

I'm currently working on a query that should return a subset (i.e. "new") CartoDB table sorted by proximity to a given point. I want to display labels on the map corresponding to the closest, second ...
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1answer
31 views

Parcel Owner to see only his parcel in map application

How can i create a map where user can only see his parcel. parcel are defined has one unique ID. I have Arcgis online Server and Desktop Advanced license. the map to be published in a web application ...
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1answer
35 views

Using MapInfo SQL?

I am trying to create a map of U.S. counties that shows migration patterns. I have a table of all US counties and a table that has migration information. Some counties do not have migration, ...
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1answer
88 views

Using function in SQL query with ArcPy?

I am trying to join points to polygons based on whether their addresses match as well as if the distance between them is less than 2500 feet. I defined a haversine function that computes the distance ...
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1answer
68 views

Generating pivot table in PostgreSQL that ties cities to counties using QGIS (or PostGIS)?

I have a cities shapefile and a counties shapefile. I have the counties shapefile imported to a PostgreSQL table. I haven't transferred my cities to PostgreSQL yet, but the issue I really want to ...
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1answer
74 views

Where clause in MapInfo Table Updates

Is it possible to add a where condition to an update query in MapInfo? At the moment I have to do a query to select the records I need and then do an update on that query. I believe this is ...
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1answer
46 views

Querying a raster per pixel using a secondary raster as a condition

So here's the problem. I have two rasters containing bathymetry data: one containing the bathymetry of the sea floor, we'll call this raster1, and another containing the difference between two ...