SpatiaLite is a spatial extension to SQLite, providing vector geodatabase functionality.

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+250

A global, grid-like projection for creating heatmaps

I'm putting together an application where I need to create a vector grid which will be used to store and display a heatmap. It has the following requirements: Can cover the entire planet. The vast ...
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0answers
30 views

Loading SQLite extensions in QGIS

I have an extension which can be loaded in SQLite using the load_extension function. It would be useful for me if I could load it in QGIS to use in queries made via Database Manager. The Python ...
2
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1answer
17 views

How to rename ogr2ogr tables on export to Spatialite?

I'm exporting data from PostGIS to Spatialite using ogr2ogr. The export is working properly, except I need to be able to rename the tables that are being exported. Here's the command I'm using: ...
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3answers
28 views

Is there a way to add an autoincrementing primary key field to an existing spatialite table/layer?

I know that I can add a new column to a spatialite table either through the Database Manager (Edit Table – Add Column) or through the Attribute Table – Field Calculator (create new field) but I don´t ...
3
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1answer
50 views

Moving SpatiaLite Table into PostgreSQL using ogr2ogr?

How can I move a Spatialite table from a Spatialite db to a PostgreSQL db using ogr2ogr?
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1answer
14 views

Get DE-9IM matrix in spatialite?

Is there a way to get the DE-9IM matrix between two geometries in a Spatialite function, analogous to the st_relate() function in PostGIS? (I find it very helpful to spatially join using intersect() ...
2
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1answer
163 views

Configuring spatialite database access for Python 2.6.6

I'm working on a GIS project, and I would like to implement and test some geo-spatial algorithms in Python. For this purpose, I will not only need sqlite, but also spatialite, in order to store and ...
8
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4answers
3k views

How to export shape file to SpatiaLite

I have a shapefile with one layer. I can open it with QGis. Now I want to convert this shapefile or layer to Spatialite database. How can I do it? Is it possible to do with QGis?
2
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1answer
25 views

Is there an equivalent to ST_Rotate in spatialite?

I'd like to do some arbitrary rotation of spatial objects in spatialite (accessed through QGIS). In PostGIS I'd use something like: ... SELECT geom AS ST_Rotate(geom, radians, originX, originY) Is ...
2
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1answer
241 views

Binding between qgis custom form (qt designer) and date/time field in a spatialite database table

For my attribute table I created a custom form in qt designer. The table has a date field and a time field. In qt designer there are widgets for entering date and time. But what data type is expected ...
3
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2answers
46 views

problem merging polygons based on a column value - using Spatialite

edit: as I am unfamiliar with any tools I decided to try my luck with PostGis. I imported my data. and executed the query : create merged as select delomrade_code, st_union(geometry) from grunnkrets ...
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0answers
23 views

Can't install pyspatialite with python3 and sqlite3

I can't install pyspatialite. When I try it gives me this error: pip install pyspatialite Downloading/unpacking pyspatialite Could not find a version that satisfies the requirement pyspatialite (from ...
2
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0answers
59 views

Exporting spatialite view to shapefile from QGIS modifies the original data types

We have a spatialite .sqlite database where we have views which are nicely rendered by QGis, with all the symbols and everything!! There are integer fields on the view which are based on fields of ...
0
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1answer
47 views

PyQGis - Working with Spatialite

I wrote a Vector layer to a spatialite file/db using the dedicated API tool, using valid driver names supported formats by OGR. When connecting to that db, I can't retrieve properly the geometry ...
2
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2answers
50 views

Is it possible to decrease detail level (decrease file size) in Spatialite OSM export?

I currently use Spatialite exports from OSM data (together with Google maps like styles by Underdark) which are very useful for me as the files are easily portable with the project and I do not need ...
2
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1answer
36 views

SetFeature creates infinite loop when updating sqlite feature using OGR

when using the SQLite driver in python - setting a feature after changing an attribute field value creates an infinite loop on the first record. the same code works fine if i substitute the sqlite ...
3
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2answers
80 views

Incorrect display of national characters from Spatialite in QGIS, Windows

I used this tutorial by Underdark (thanks much :-) ) to convert my area of interest from OSM file (whole Czech Republic downloaded from Geofabrik.de server). Used OSGEO4W shell (saying "GDAL 1.11.0, ...
3
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1answer
121 views

ST_Touches function in Spatialite

I'm a newbie to Spatialite so forgive me if the answer to my question is obvious...(I tried looking online but couldn't find the answer to this question). I am trying to use the function ST_touches in ...
0
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2answers
90 views

SpatiaLite: Creating to, from nodes from a normal road layer (LINE)

Following this tutorial but using my own data. How do I create the from_node and to_node columns? I am using Spatialite and Sqlite3. I'd prefer to not use a gui as I'm working remotely via ssh on a ...
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1answer
32 views

What causes this error when loading plugin

After installing pyspatialite on my Mac two plugins fail to load with this error:: This plugin is broken invalid literal for int() with base 10: '2-spatialite' I am fairly sure that the offending ...
3
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1answer
46 views

Does QGIS automatically use spatialite spatial indexes?

When you write a query in spatialite you have to manually join your query to the spatial index for that index to be used to speed up the query. When QGIS displays data does it take advantage of any ...
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0answers
26 views

Formula to know if LINE intersects with MBR

I have a table with four columns: SRC_X, SRC_Y, DST_X, DST_Y. (SRC_X,SRCY) have position of the start point of a LINE, (DST_X, DST_Y) have position of the end POINT of a LINE. I know there are ...
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23 views

Know if MBR contains any POINT of LINESTRING

I have a table with a Geometry column. This column only has LINESTRING. This LINESTRING only has two POINTS. If i have a MBR, i need to know which of LINESTRING of my Table has some of its POINTS ...
2
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0answers
64 views

Performance issue with SQLite + Spatialite + C#

I am having a performance issue with SQLite database (.db) which extends to SPATIALITE I am trying to update Geometry of 1,00,000 records in database (.db) which taking around 50 minutes. Too much ...
0
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1answer
173 views

Error Loading spatialite extension in .NET Project using System.Data.SQLite

I am trying to use Spatialite in a .NET application using the System.Data.SQLite provider. I have tried to load 'libspatialite-4.dll' but an error happens when I call function ...
0
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1answer
32 views

How to define which columns in a Spatialite database are the latitude and longitude?

I have imported a CSV containing points with coordinates specified in columns named Latitude and Longitude. How do tell spatialite that these columns are the coordinates of of my points?
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1answer
38 views

What is format of Natural Earth SQLite database GEOMETRY column?

I need to extract coordinates of polygon boundary points in order to draw a map in my application. Does anyone know what is format of "GEOMETRY" column in this database? It doesn't look like .SHP ...
0
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1answer
40 views

PtDistWithin() with Geometry from query

I'm trying to run two Spatialite queries in Python — the first one picks a single point from a table, and the second tries to find all points that are within a given distance of it. So my queries look ...
0
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1answer
28 views

BuildCircleMbr with 1km of accuracy - spatialite

I want to create a Circle MBR in spatialite of 1km for example from lat/lon in WGS84 I use BuildCircleMBR but i am not able to generate this well. My query SELECT BuildCircleMbr(40.0,-4.0,1, 1000) ...
0
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1answer
31 views

Find position of a character within a string in Spatialite

I have a bunch of data generated as a .dbf by ArcMap that I imported in Spatialite for processing. One of the columns (text data) is of critical importance since it contains the ID of a point and a ...
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1answer
86 views

Problem loading spatialite extension with sqlite3 Python connector

I am trying to load the Spaltialite extension using SQLite3 python module. I am getting the following error when I run my script. EOFError: [Errno 10054] An existing connection was forcibly closed ...
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46 views

pyspatialite, cannot update geometry

I'm trying to update geometry column with pyspatialite but it returns error: spatialite.dbapi2.IntegrityError: mypoints.the_geom violates Geometry constraint [geom-type or SRID not allowed] My ...
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2answers
102 views

TatukGIS SQLite Spatial vs. Spatialite

I must apologize in advance, I'm just getting into GIS and trying to figure things out. I have an SQLite spatial database that I'm pretty sure was created in TatukGIS. I've tried to open it in QGIS ...
0
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0answers
34 views

How to overlay polygons that are in the same layer

I need to INTERSECT many polygons that are in the same layer. Actually each polygons from my layer represent an area of influence from one specific bird species. Since I used to use ArcMap, I found ...
5
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4answers
489 views

How to merge close points into polygon?

I have a set of coordinates (points & no overlaps) in a single table,each containing attribute number fields,like in the following image. I want to merge these points into smallest polygons by ...
3
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2answers
340 views

Is it possible to embed QGIS layer styles in a Spatialite database?

Spatialite is a great alternative to shapefiles - but how could I store the QGIS layer style together with the data so that it has a default style? For a shapefile I would just save a [name].qml with ...
0
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1answer
69 views

no viewable feature when creating line with ogr in python

the python code below produces the expected line shapefile viewable in QGIS import os from osgeo import ogr drv=ogr.GetDriverByName('ESRI Shapefile') if os.path.exists('test.shp'): ...
3
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2answers
146 views

Combining MS Office with GIS

I would like to incorporate MS Office into my GIS program. I have been using QGIS and was wondering if this would be possible? I am trying to create a one stop shop for my staff to be able to ...
3
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3answers
401 views

Sqlite, Python 2.7 and Spatialite

I am trying to spatially enable my sqlite database: import sqlite3 db = r'c:\temp\mydata.sqlite' conn = sqlite3.connect(db) conn.enable_load_extension(True) cur = conn.cursor() cur.execute(r"SELECT ...
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2answers
14 views

geos_ts_c.cpp + spatialite Error

select distance(T1.Geom,T2.Geom) as Distance, T1.POI_ID, T2.LINK_ID from temp1 as T1, temp2 as T2 where T1.POI_ID = T2.POI_ID AND Distance < 100 temp1 having point geometry temp2 having line ...
0
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1answer
48 views

ST_Within from centroid of geometry

I am looking at doing a spatial query where I can find when the center of one feature falls within another. For example, when the center (centroid) of a building falls within a grid tile. I know I can ...
0
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1answer
51 views

Populate Table from Table Spatialite

I am trying to populate a column in a table from another table using Spatialite. My query will not populate the column, and I can't seem to identify what is wrong. I modeled the query from the ...
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0answers
13 views

Count gaps between polygon in spatialite

I have a database (.db) with a table that contains thousands of polygons containing id and geometry. I like a query that can get me the 'number of errors where there are gaps between polygons". How ...
0
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0answers
27 views

How to move point in Spatialite Layer through manual entry of X/Y coordinates?

My Spatialite Database (Point Layer) looks like this (arch_locations.sqlite) Fields: pkuid short_ID name geometry X Y The field "X" and"Y" I added later (after first creation of DB) using the ...
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3answers
102 views

How to add columns with x/y data to Spatialite Layer? [closed]

I´m new here and I am also quite new at working with QGIS. My Spatialite Database looks like this (arch_locations.sqlite) Fields: pkuid short_ID name geometry I´d also like to have two additional ...
0
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0answers
75 views

How can I get the set of points (cloud) that are a given distance in SpatiaLite?

I have a set of points and need to get the groups of points that are within a distance x. Ie, determining the point clouds that are up to the distance x from each other. Any help would be ...
0
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1answer
93 views

Error on rendering linestring

I am using Mapnik 2.0.1rc0 on a Windows 7 with python 2.7 32bits inside a GeoDjango App using xml. The datasource come from spatialite 4.0. My tiling script can render polygon and point features ...
0
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1answer
35 views

Can SpatiaLite Indexes be used from views?

I'm working with a large SpatiaLite database and trying to take advantage of some spatial indexes I have on my tables that I'm attempting to access through views. Essentially, I have a number of ...
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0answers
33 views

Spatialite database creation problem (QGIS DB manager)

I am trying to create a Spatialite database in QGIS 1.8.0. Step one of instructions is: Right click on the Spatialite entry in the Browser tree and select Create Database. The Spatialite icon is ...
0
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0answers
79 views

QGIS custom form and autocompleted data entering with “validation check”

In Qt-Designer I created a custom form where I can choose serveral species names in two different combo boxes. This combo boxes are linked via "value relation" to the accordant non spatial tables ...