The selection of data from a database based on some criteria.

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1
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0answers
141 views

How to select and highlight feature by attribute

I have the below code which does a select by shape on my arc map how do I achieve this with attributes 1.The map has only one layer 2.There is a filter for the attributes on features Below is the ...
1
vote
1answer
215 views

ArcGIS wmslayer select feature android

I am using ArcGIS Runtime SDK for Android and it supports wmslayer but there is no sample or code for selection feature with using wmslayer. My app shows the map getting data from my wms server. Do ...
0
votes
1answer
23 views

QGIS 1.8 or 2.01 select entries in .shp file that match a field entry [duplicate]

I've got a .shp file with 40k points (trees) in it. One field is the species name. Is there a way to select those entries that match a desired field name e.g. 'black walnut' so I can move them to a ...
8
votes
2answers
480 views

Simple way to detect/select border polygons of a shapefile

I am looking for a simple way to detect/select border polygons of a shapefile. Border polygons are here polygons that are not completely surrounded by other polygons i.e. polygons located at the ...
4
votes
0answers
159 views

How to select features based upon multiple values in graphical modeler?

I'm trying to create a basic model using QGIS, the QGIS graphical modeler and the sextante toolbar. In part of the model, I need to select features based upon multiple attribute values (for example - ...
2
votes
1answer
498 views

QGIS select feature, “add to current selection” feature

I am trying to perform a feature selection on qgis similar to "add to current selection" interactive selection method in Arcgis Desktop, is that possible? An example: I perform a spatial query and ...
1
vote
2answers
112 views

Selecting a polygon within polygon where part of its boundary is the same. PostGIS

I would like to know how can I select a A_polygon within B_polygon, but part of the boundary of the A_polygon touch the B_polygon boundary. In Postgis 2.0, I tried few options but they didn´t work ...
3
votes
0answers
166 views

QGIS Select Single Feature not correct in attribute table

For some reason, QGIS is not displaying the correct row of my data when I click on a feature with "Select Single Feature" or even the other select tools. I have a point database linked from mysql. ...
2
votes
1answer
2k views

Activating and deactivating of button control not working properly

I have got two buttons, one for editing purposes and one just to see all the information related to the polygon I selected. Also I added these two buttons on my panel using OpenLayers control. I am ...
1
vote
1answer
542 views

Check if feature is selected (Openlayers)

I wonder if there is a way to check whether a pointfeature (OpenLayers.Feature.Vector) is selected. I read the API, but didn't find any solution. Any idea?
3
votes
2answers
392 views

How to select features with NULL Geometry from Shapefiles?

I have been given a Shapefile that contains records with NULL geometry, along with records with non-NULL geometry. This situation appears to cause problems in QGIS (1.8 and 2.0) when editing the ...
1
vote
1answer
351 views

Openlayers SelectControl add multiple Layers

Heres my code to add an SelectControl with Popup for an existing layer add startup map.addLayer(window.markerLayer); window.markerLayer.events.on({ }); // Popup für Marker window.selectControl ...
1
vote
2answers
430 views

OpenLayers: WMS layer above select-controlled vector layer?

Is it possible to display an image layer (WMS or Image) above a vector layer with activated SelectFeature control in OpenLayers? The image layer (radar returns) contains only sparse, semi-transparent ...
1
vote
3answers
557 views

How to select features of visible layers in QGIS

In QGIS 1.8 I used plugin "Select features of visible layers by rectangle" to know the layer that owns a visible feature. In QGIS 2.0.1 this plugin is no more available. I wonder if it is possible to ...
0
votes
1answer
83 views

Openlayers selection

Is it possible to select a polygon from a predefined Lat & Lon programmatically? eg location point: x='1234' y='5678' intersects polygon '1234', therefore SELECT POLYGON '1234' So far I have ...
5
votes
2answers
459 views

How to detect duplicates and keep only one?

I've got a table with lots of points (200.000). Some of them are duplicates (not exactly but e.g. a metro station has eight entrances) and I want to keep only one of these metro entrances. I am able ...
4
votes
1answer
400 views

How to eliminate small polygons using ModelBuilder to iterate through feature classes

I created four large polygon feature classes of surface slope classes from a grid of 6-foot cells covering half my county. In order to repair the geometry and eliminate small polygons I broke four ...
0
votes
1answer
72 views

how to select parts of a shape in QGIS

I have to have a Shapefile of France of the bigger regions: Ile-de-France, Bretagne, etc. and that is already included in my shape. But its only shown the Arrondissements (smaller regions) in France ...
0
votes
0answers
26 views

How to select areas from a target layer which do not intersect source layer? [duplicate]

I have two different layers, one is county boundary and another one is soil map. My question is I would like to select only those areas which are outside the county boundary. Using "Select by ...
0
votes
2answers
238 views

javascript function to search all OpenLayers vector features covering a pixel

I have an OpenLayers map that draws features in a vector layer. The features are selectable and have a popup on select. Unfortunately in a lot of cases the features overlap so it can be impossible to ...
3
votes
1answer
1k views

How to highlight on mouseover without wiping out select control

I am trying to highlight features of a vector layer as the mouse moves over them. I can make this work. I'm also trying to make the features selectable and have a popup box when they're clicked. this ...
3
votes
2answers
1k views

ArcObjects snipped to Select all Features currently visible on the ArcMap screen (ActiveView)

I guess I have to get the extent of the ActiveView and then use it to perform a spatial search. Is that the proper way to do it? Please share the code snipped if you have any. Thanks.
1
vote
2answers
4k views

OpenLayers Select a feature from attribute or id

Using Openlayers.....Is it possible to select a feature on a map by an attribute? eg: Select a feature from a dropdown menu populated with the feature "id" or a table field attribute values.
0
votes
1answer
292 views

Map Basic. Where-clause in Select Statement

what is wrong with this statement? I recon the where-clause is the problem. Select * from "BEDIRECT_POT_" + vo_num, PLZ5_2012_bereinigt where "BEDIRECT_POT_" + vo_num.PLZ like ...
6
votes
1answer
4k views

How to select points within a polygon from another layer?

I'm using QGIS 1.8 with a PostGIS database and I have three postgis-layer in qgis a lines layer, a points layer and a polygon layer. What I'm trying to do is to select a polygon in the polygon layer ...
1
vote
2answers
295 views

Selecting an item with the mouse in MapBasic

This may seem relatively simple, but I'm pretty confused. I have written a mapbasic tool that does things to the table 'Selection' depending on user choices in a popup menu, but currently you need to ...
1
vote
2answers
257 views

How to select two points on a map using QGIS?

I need to select two points on a map in QGIS. I selected the element selection tool in menu view and I want to select two points. How can I accomplish this? Are there other tools or methods to ...
0
votes
1answer
1k views

Having trouble selecting polygon from existing layer (using OpenLayers.Control.SelectFeature)

I am hoping someone can point me in the right direction. I am not a programmer, so that is my first roadblock. ha The problem: I have an existing polygon layer and I am trying to select one of the ...
3
votes
2answers
407 views

How to Select by Attributes on features sharing common value?

I am attempting to 'select by attributes' a point feature with the lowest numeric value which shares a common value with other point features in another field. For example: I may have 3 point features ...
5
votes
1answer
3k views

How to Export Selected Feature to New Shapefile Using ArcPy?

I currently have a search cursor iterating through a shapefile in ArcGIS 10.1 that selects a feature and runs a viewshed analysis on that feature (and only that feature). What's the easiest way to ...
0
votes
2answers
366 views

Select / Deselect and Identify Features in QGIS

Sorry if this is all a bit 101, but I'm new to QGIS. I basically have a large Arc project that I can access in QGIS for reference, so will only really be using it to identify features. For example to ...
0
votes
1answer
180 views

How can i select many rows from a table?

I want to create an action that select many rows from PostGIS table to show many lines in QGIS. How can i select many rows from table with python to add these rows in a layer? Thank you
1
vote
1answer
207 views

Why does this SQL syntax produce empty feature class with ArcGIS Select_analysis?

I'm working on a script that involves an arcpy.select_analysis function. The problem I have is that when I run the script it produces an empty file. I've verified that the whole thing works when in ...
1
vote
1answer
216 views

Sorting points with QGIS

I have a very good idea of what I would like to do but I really do not know if it is possible with QGIS. I have points that each one corresponds to a group size and I would like to use GIS to sort ...
0
votes
2answers
84 views

How to select by polygon in PostGIS with misaligned layers?

I have two polygon layers, one which defines subregions of the other. However, the layers do not line up exactly, so there are minor discrepancies along the edges. I would like to select all minor ...
0
votes
1answer
97 views

Selecting a Polygon based on the location of a point

Currently I have a polygon layer made up of three shapes. All the shapes are listed in the attribute table. One of these three shapes intersects a point. I would like to select just the shape that has ...
0
votes
1answer
40 views

PostGIS: Querying a record table and explanatory table

Basically I have two tables one containing a collection of records and one table that contains extra info about features in the first. i.e Records Table: GID SITE SPECIES GEOM and the second table ...
2
votes
1answer
411 views

Select top 5 most items in a geodatabase

I'd like to know what is the best way to select the 5 most expensive items (in terms of actual monetary value) in my geodatabase where i have a price field. Prices are not necessarily ordered but can ...
2
votes
2answers
563 views

Using select by location to update a field in a feature class

I am using Arc 10.1 and I am working on a script that takes a value from a field within one shape file and updates a field in another shape file based on its location. Basically I have smaller parcels ...
1
vote
1answer
379 views

Data Driven Pages, Graphs, and selections in ArcMap 10.1

Is it possible in python to create a selection set based on the extent from a Data Driven Page (DDP)? I have a layout view with a map and a graph. The graph is set to only plot the selected set of ...
3
votes
1answer
260 views

Why would Select By Location appear not to work properly after Multipart to Singlepart?

I am having issues using ArcGIS Desktop 9.3 and the multipart to singlepart feature and then selecting by location. Basically, I am able to run the multipart to single part feature to split up some ...
2
votes
1answer
330 views

How can I select features by map clicks

I'm developing a flex web application using the ArcGIS flex API 3.1. I have a map with a polyline feature layer. I'd like to be able to select polylines from the map by clicking on the features on ...
9
votes
2answers
5k views

How to get list of selected features in ArcGIS for Desktop using Python code?

I have a question regarding selections in ArcGIS for Desktop. Assumed I have one layer in ArcMap and I have selected two of five features. Is it possible to get a list of all selected features by ...
1
vote
1answer
735 views

How to select features from different WFS layers?

I'm trying to select features from different WFS layers but unfortunatelly it doesn't works in my code. This is my code: var select = new OpenLayers.Layer.Vector("Selection", {styleMap: new ...
2
votes
1answer
83 views

How do I select all polygons in a layer that border 2+ polygons in the same layer?

My data consists of equal-sized polygons. I need to identify and select all the polygons that border two or more polygons.
5
votes
6answers
451 views

How to divide a feature class into ranges?

I have a shapefile consisting of around 4000 polygons. The polygons are created from buffering around a similar number of islands somewhere in the Norwegian archipelago. Due to an error in the ...
4
votes
3answers
5k views

How can I unselect a feature in Openlayers?

I am able to identify the selected features on my map using the following line: vector_layer.selectedFeatures I would like to be able to deselect this feature using a standalone function (not an ...
2
votes
2answers
207 views

How can a style be set on a specific polygon using OpenLayers?

Using a polygon id, I want to highlight a polygon, while the mouse is outside of the map area. I can identify the polygon using the following approach: x = 53; for(i=0; ...
3
votes
2answers
1k views

Can't Select and Export from Python Script

I am a novice in python programming but I am trying to learn by doing. I got stuck with this function a while back and can't seem to find a solution or a workaround. I am writing a script that is ...
2
votes
1answer
212 views

How can I select enclosed features within the same layer?

My problem: I have a single shapefile from a habitat-survey and need to select all hedge-features that are enclosed in meadows.The features that are to be selected were created by filling rings. ...