A command used to retrieve information from a database

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10 views

How to pass time dimension to postgis DB layer WHERE clause in Geoserver?

I have successfully configured a layer with time dimension that is backed by an SQL query to a PostGIS DB. I can query it throug WMS, no problem so far, but I just can't find a way to pass the start ...
-3
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0answers
13 views

MySQL Query in WAMP [on hold]

How can i query the last row in MySQL DB in WAMP, and then display those coordinates in ArcMap ?
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0answers
19 views

Selecting cells with values from DEM those are above specific value corresponding to each polygon?

i have a shapefile with 2000 polygons and a DEM. i want to calculate zonal mean for each polygon considering values from DEM which are above a particular value for each polygon. i want to it with ...
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2answers
38 views

How to specify two different and separate conditions in query builder?

For example, I have a table containing well log data for multiple operable units. I would like to make a query outputting a table where Operable unit=001 OR 002, AND Formation= Residuum. I would ...
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0answers
24 views

Most representative spatial queries [closed]

I would like to do few tests of different spatial databases and compare response times for different types of queries. There are some studies available but they often do not present the selection of ...
0
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1answer
24 views

Search widget expression

I am trying to migrate my Flex eSearch widget to the CMV Search widget. The query is not working. What can I do to make it work? Flex query: <value prompt="Example: MN or ...
3
votes
1answer
201 views

Selecting limited TOP n from specific column in ArcGIS query builder?

I'd like to know what is the best way to select a limited top 'n' of rows from a specific column of a geodatabase file. Currently I use a function in the query builder of the select tool (arcgis10) in ...
1
vote
1answer
37 views

Changing Query Layer's SQL Expression with Python

I use query layers in ArcMap 10.4. The maps need to be done/repeated periodically. The easiest way is to copy the map, change the source's SQL expression (e.g. from select * from TABLE where Period = ...
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0answers
26 views

How can I determine an appropriate query based on a join?

I am having trouble coming up with a query that will show the 12 states total population percentage in ArcMap 10.4. I created the spreadsheet below and I have already joined my excel to the states ...
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2answers
47 views

Calculate area parts of polygon intersections

I have a problem of calculating area sizes of intersected polygons in postgis. I would represent the problem in an example (please see the picture). I have a gridsquare table with some attributes like ...
3
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1answer
22 views

QGIS: Error message in query builder

I am using QGIS version 2.14.1 (Essen) and trying to update data in my table using field calculator. I am inputing the following statement: update "table_1" set "table_1" ='y' where "table_2" ...
2
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2answers
160 views

QGIS keyboard shortcut to launch a 'Select by expression' query

I can't find if it is possible to launch a 'Select by expression' query (not to open the dialog) with a keyboard shortcut. I can't find this option in the Settings > Configure shortcuts list... If ...
0
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1answer
190 views

Get CartoDB query by distance to work

Has anyone tried this tutorial: Query by distance ? This is a copy of the final code which they use for the map: <html> <head> <link rel="stylesheet" ...
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0answers
10 views

How can I create a definition query to show the next 5 years of data, based on a text field with the year on a joined table in SDE?

I need to show the next 5 years of construction data, but I want it to automatically update what is shown based on a text field called ConYearStartNbr that shows when the construction is set to start ...
0
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2answers
187 views

Performing spatial join in Spatialite (QspatiaLite for QGIS)

I'm trying to spatially join and summarize the attributes of a set of buildings to a set of containing parcels. There are (potentially) many buildings to each one parcel. Here is the query as I'm ...
3
votes
4answers
4k views

How to group and count attribute data?

I have a problem with group same data to count it. For example, i want to group same code to one and count them. I can do it when i use MapInfo (Pic 1) but i can't in QGIS. (Pic 2: i can classify ...
3
votes
1answer
1k views

PostGIS intersection function

I have a problem with intersection function. I built my query following http://manual.linfiniti.com/en/postgis/geometry.html, 5.7 section. I made my clip object, a red linestring frame: But after ...
0
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1answer
960 views

SQL Geometry Query similar to Select by Centroid

Does anyone know if it's possible to query SQL geometry by something like 'centroid of polygon'...similar to ArcMap's select by location? I'm using SQL Server 2008 R2 as the DBMS. I have two polygon ...
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1answer
1k views

How to make Stored Queries for WFS 2.0.0 in Geoserver

I am a new user of Geoserver. I have created a WFS and also could connect it with the QGIS WFS 2.0.0 Client plugin available now. But as like the default WFS link in that plugin I am not able to make ...
2
votes
1answer
77 views

SQL / Select by Attributes query for “does not include text found in another specified field”

I'm using ArcMap 10.2 and I'd like to write a query to select features where Field A does not include text found in Field B. Specifically, Field A contains street numbers and street names. Field B ...
3
votes
2answers
150 views

Selecting more than 1,000 features from AGOL hosted feature service?

When data from a cloud-hosted feature service is loaded into ArcMap, it queries the first 1,000 features "to enhance performance"... I, however, need to see all the features. How can I add all ...
0
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0answers
30 views

Accessing array of x,y coordinates stored as MDSYS.SDO_GEOMETRY / PUBLIC.SDO_GEOMETRY attribute in Oracle 11g?

I am totally new to GIS. I am working with a table in an Oracle 11g database. In each row of this table there are two attributes of interest: one is of type MDSYS.SDO_GEOMETRY and the other ...
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2answers
42 views

Using PostGIS to query shape files

I am very new to PostGIS (started using it this morning). My goal is to determine if a lat/long point is contained inside a polygon that is described in a shape file (The shape file has a single ...
2
votes
1answer
397 views

Querying OpenStreetMap tags by polygon using QGIS?

If I understand OpenStreetMap (OSM) correctly, all objects essentially have associated tags based on type of object (street, building etc) ... Can I use QGIS to obtain the statistics of different ...
0
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1answer
38 views

how to skip creating an empty feature class using featureclass to featureclass in arcpy

I have a script that finds points outside of selected areas and creates a feature class in a file geodatabase. However, sometimes there are no points outside of the selected area. Currently, the ...
1
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1answer
40 views

Use spatial queries on multiple layers in QGIS

Is there a way to perform spatial queries on multiple layers in QGIS without going through an external database? I would like to perform SQL-like queries on layers imported in QGIS directly, but can't ...
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0answers
22 views

Testing Oracle query produces valid results in QGIS Python Console

I have a query that searches an Oracle database using a where clause to get the geometry of an object and then zooms to the extent of that object. The value for the where clause is retrieved from a ...
0
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1answer
218 views

Summarizing at Modelbuilder

I like to summarize of the ID-Field with the ModelBulider because in the end I have to build a tool. The problem I have is that the field “GRIDCODE” should get in the new table comma separate. So that ...
1
vote
2answers
64 views

How to add state polygon information to a city point?

I have the following layers: Country border federal state borders cities (located as points) I would need the following result file (txt or csv..): A column with the name of the city and another ...
5
votes
1answer
174 views

How to build a query/expression to select specific points within a buffer? (in QGIS)

I have a point layer in QGIS. Each point represents a tree and each tree has information about its height as an attribute. I would like to build a query/expression to select all those trees that have ...
5
votes
2answers
992 views

How to run custom queries on vector layers and display results?

Is there a way to display the result of a query in QGIS? For instance : To get the total number of inhabitants : SELECT SUM( inhabitants ) FROM countries To get the total density : SELECT ...
3
votes
1answer
825 views

query / filter on attribute tables with external tables joined

i tried to do some queries on joiend table fields ... i've got/found some answers concerning version 1.8 - which result in "use select + export to create a combined dataset" so i just did some tests ...
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1answer
55 views

query.where statement using date range in JS API fails with IE 11 but works fine with Chrome and Firefox

My aim to display point data from a feature layer on ArcGIS for JS map interface. I am successful doing so in Chrome and Firefox, however when I include date in a where condition of a query execute it ...
3
votes
1answer
6k views

Exporting query to identify what polygon certain points fall in using ArcGIS Desktop?

I'm using ArcGIS Desktop 10. I have shapefiles consisting of points (street addresses). I also have shapefiles consisting of polygons (ie, congressional districts, city council districts, etc... a ...
2
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2answers
187 views

Can't import certain tables from SQL Server to QGIS

This is a list of 193 zip codes and their geometries that do not import in QGIS. This is a list of 999 Census Block Groups and their geometries that do import in QGIS. This is the Add MSSQL Layer ...
1
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1answer
1k views

How to query all layers in ArcMap and get access to them by name or index?

I have ArcMap with tons of layers. Some of these layers may contain another layers with data (aka Composite layers) or they don't. The depth of composite layers in unknown. I need to query all layer ...
3
votes
1answer
218 views

How to build a query tool for spatialite data in QGIS?

I am trying to build some tool for a collegue of mine to query data from a spatialite database while clicking on vector features. My first guess is, that I could do this with an "action" I define for ...
3
votes
1answer
103 views

Distance in meters between two geographic coordinates

I want to determine the distance in meters between two geographic coordinates. The points are: Lat (deg) Lon (deg) A: -33.3930906 -70.5452765 B: -33.3993212 -70.5468767 So if i calc the ...
0
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1answer
53 views

Arc 10.2.2 crashes when adding query layer?

I'm trying to add a query layer from an Oracle database into a blank 10.2.2. map. I enter the query, validate, finish, and the software thinks for a second and then just winks out. No error ...
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0answers
36 views

Overpass output city name instead of coordinates?

I did a query to look for certain things. However it only outputs the lat and long coordinates, there is no city data available. I'd like to have the city it belongs to / closest city though. I know ...
4
votes
3answers
3k views

Selecting MAX values within records with the same name

I'm working in ArcMap 9.3 and I've never dealt with that kind of queries... I need to Select the MAX value from column [A] for each set of records in the table which have the same value in column [B] ...
2
votes
2answers
86 views

Count Distinct with Where clause in OGR

I am looking to run a query in OGR to write back all instances where there is only one record of an attribute. I was thinking that I would use the following: ogrinfo -dialect sqlite -sql "SELECT ...
0
votes
1answer
48 views

How can I add a new layer, then remove previous layer from a Leaflet/CartdoDB map without the map clearing everything

I am new to CartoDB/Leaflet. Here's my fiddle... http://jsfiddle.net/zippyferguson/fLkqgf4q/1/ If you click the play button, I want it to load data to the map year by year from 1966 to 2015 from a ...
1
vote
1answer
134 views

PostGIS Query To OpenLayers

I am trying to get data from a PostGIS datatable using .NET, pass it to javascript, create a layer in OpenLayers and add the PostGIS data to the layer. I can successfully query from the ...
0
votes
3answers
105 views

Pass GeoJSON from .NET to Javascript

My .NET/OpenLayers/GeoServer/PostGres-PostGIS application allows users to create custom queries to get data from my PostGIS tables. The queries are called in .NET (not javascript) using a web method ...
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1answer
57 views

Creating a menu interface to update an sde feature class in ArcMap using arcpy?

I work in electrical utilities and we have stacks of paper records that need to be updated into an existing SDE feature class attribute table. My problem is that someone in the city's GIS office would ...
1
vote
1answer
56 views

Making table from MySQL query with ArcPy?

I am trying to interact directly with data from a MySQL database in ArcMap using Python. So far, I have successfully connected the database using the MySQLdb.connect() function and have successfully ...
28
votes
3answers
2k views

Is there a “Select by Attributes” plugin/widget for ArcGIS Server JS API?

I'm hoping to find some existing code which emulates the "Select by Attributes" dialog in ArcMap, within the ArcGIS Server JavaScript API. Writing a hard-coded QueryTask is easy - I'm looking for ...
2
votes
1answer
51 views

QGIS and intersections

I have MultiLineString geometry data from an ESRI shapefile. I also have a polygon (region) that I have created in QGIS using the drawing tools. When I attempt to find the intersection between the ...
1
vote
1answer
62 views

Postgis/SpatiaLite SQL query to connect MySQL, Access or Oracle database

In SpatiaLite or Postgis, how can one create a SQL query to read a table from a MySql or Oracle database? I don't know **the correct SQL syntax to connect to a table in a MySql or Oracle database ...