The process of generating an image from a model.

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4
votes
2answers
220 views

Is it be possible to re-render parts of a tile pyramid when postgis table updates?

I have this idea of using postgis together with a tile renderer for serving my organization with tiled maps. As I believe my data will be partially altered almost on a daily basis it does feel like a ...
2
votes
1answer
135 views

How to change default symbol in Categorized symbol renderer (python console) or use different icons as vector layer symbols?

I have a point shapefile in QGIS 2.10 and I want to display one of its fields attributes based on its unique values (I always know that it has 4 unique values and their values so I do not care for the ...
3
votes
1answer
210 views

OpenLayers.Renderer.Symbols custom named by function

Is there any approach to define custom OpenLayers.Renderer.symbol by a function? For example, instead of making a symbol for each 3-pointed, 4-pointed, 5-pointed etc. star OpenLayers.Renderer....
18
votes
4answers
9k views

Optimal video cards for GIS programs

I recently purchased a Dell XPS-8300 (i7-2600|16 GB DDR3 RAM|64-bit Windows7) which I intend to use primarily for GIS programs. I bought a refurbished model because it was much cheaper and because I ...
0
votes
1answer
27 views

How to determine when the map has finished rendering

I have written a few functions to compare QGIS performance to MapInfo. Most of them involve doing some analysis then dumping the results on the map, as such the process would be considered 'finished' ...
1
vote
1answer
605 views

Tile server - problem with tiles loading (pink tiles)

I have built a tile server by following this instruction: https://switch2osm.org/serving-tiles/building-a-tile-server-from-packages/ and i have a problem. When i test tile server using http://...
0
votes
1answer
24 views

raster sytling multiband rendering 0=nodata

Is there any way to set the pixel value 0 to nodata of a raster stack in the multiband rendering type in QGIS? I remember that it is possible to check a box in arcgis for that, so maybe i just ...
3
votes
0answers
45 views

Python QGIS crashes within categorized renderer setup

I'm hassling around with QGIS renderer definitions in python with QGIS 2.8 at debian wheezy. At least I want simply build step by step a categorized renderer to fill a polygon. The script crashes, ...
1
vote
1answer
70 views

Dynamically move map canvas and main window using PyQGIS

I am trying to create plugin that will open new window with some layer, Dynamically "pan" my window, when main window is pan. So boundingbox coordinates should be the same in both windows. I need new ...
0
votes
0answers
28 views

Splitting polygons (fishnetting) for improved performance?

I have been asked to develop a program to split polygons into smaller polygons to improve drawing speed in ArcGIS/QGis. While this is fairly simple, I am questioning the reasoning behind this? To ...
0
votes
0answers
35 views

renderd: encountered during parsing of layer 'landuse_gen0'

I am trying to set up open street map on a Ubuntu machine on Amazon. I have imported the whole world into postgresql and it took many days. I am following the tutorial at https://switch2osm.org/...
0
votes
0answers
14 views

Leaflet renders big lines

On opening the page i get this type of view.The lines are very thick. On clicking anywhere in the map it changes to 2nd picture.I am not being able to figure out why this is happening.
5
votes
2answers
99 views

How to render bottom layers after higher ones in QGIS?

I'm using QGIS 2.14.3. Is it possible to render bottom layers after higher layers while still keeping them underneath? (or can rendering only be bottom-up?) I have seen the "control rendering order" ...
3
votes
0answers
69 views

QGIS canvas refresh & rendering control from plugin?

Plugin Description I have been working on a plugin which essentially doing the same as "GPS information" live tracking but with capability of displaying two GPS streams. I am comparing streams and ...
2
votes
0answers
53 views

How to get OpenLayers Plugin to render base maps at a large scale i.e. 1:1000 or larger?

Am I the only one with this problem? You have a nice open layers base map and get ready to digitize vegetation at a very high resolution but as soon as you zoom in, Open layers fails to render the ...
5
votes
4answers
2k views

Shapefile layers in QGIS don't display unless I zoom out

I have two shapefile layers in a Qgis project that have problems with zooming. One is a line I copied/pasted in a new layer from a set of height contours and the other one is a polygon layer I created ...
1
vote
0answers
34 views

Layer style is not rendered properly using PyQGIS

I'm trying to render a layer with the given .qml style into .png image using a standalone PyQGIS application. The issue is that not all the layers of the symbology are rendered, e.g. a polygon with ...
0
votes
1answer
553 views

Geojson not rendered with Mapnik

I am trying to generate a tile with Mapnik with a GeoJSON. The stylesheet.xml with the part to render the GeoJSON is the following: <Style name="cities" filter-mode="first"> <Rule> &...
1
vote
1answer
86 views

Parsing and rendering JSON data in Java with GeoTools [closed]

I'm working on a Web Map Service written in Java and using the GeoTools library. My goal is to make the data parsing json format, so I'm using the form Unsupported GeoTools. This is the parsingJSON ...
3
votes
0answers
26 views

Rendering features based on relationships using ArcGIS for Server?

We are trying to determine an efficient way of rendering features depending on values in a different table. Background is this: We have a few thousand features in a MapService on an ArcGIS Server and ...
2
votes
0answers
101 views

Exporting map containing raster layer with vector field symbology ends up with partially rendered symbology from ArcMap?

After exporting a map in ArcMap (ArcGIS 10.3 for Desktop) which contains several raster and vector layers including one raster layer resembling flow direction of ice, the output file (tried JPG, PNG ...
4
votes
2answers
228 views

How to render layer into png in a standalone application?

I would like to use standalone appliction to apply .qml style to a layer and use QgsMapRenderer() to save it as image on a hard disk. The are a lot of questions like mine at this site and it seems ...
4
votes
3answers
102 views

QGIS reduce density of points displayed

I'm working with a considerable amount of points and I would like to be able to display only part of them since they overlap a lot and are cumbersome to display. Most of them form a trajectory so ...
2
votes
1answer
32 views

Polygon rendering issue in map composer, QGIS 2.8

Since a picture is worth a thousand words, let's go straight to the point. This is what I get in QGIS main window (and what I'd like to get in QGIS' map composer): And this is what I actually get ...
2
votes
1answer
33 views

Rule-based rendering of one line with two line styles

I need to show parts of a network, which meet two criteria at the same time. So I would like to use the style of criteria 1 and the style of criteria 2 side by side (see picture). The problem is, that ...
0
votes
0answers
232 views

How to access the rules of QgsRuleBasedRendererV2 using python?

I can't get access to the rules of rule-based renderer, python says there's no attribute "rootRule", though documentation says it should be (http://www.qgis.org/api/classQgsRuleBasedRendererV2.html) &...
0
votes
0answers
17 views

Group points in polygons [duplicate]

How to group points into polygons? In Qgis if I want to render a point vector layer into a polygon layer, grouping all same colors.
1
vote
0answers
47 views

How to build OpenSeaMap/renderer on ubuntu 14.04? [closed]

I have set up a tile server on ubuntu 14.04, downloaded the openstreetmap-carto style and compliled it with carto. Then I customized the renderd.conf file like this: [renderd] socketname=/var/run/...
0
votes
0answers
24 views

D3.js geojson rendering problem

Step 1 I have install mapshaper in my machine and browse all those required file along .shp, .shx and .dbf file . Step 2 : I am able to see required shape of this particular district in mapshaper ...
0
votes
0answers
83 views

Print a map with Geotools

I want to print a map with a raster image as base-map using Geotools. The problem is that the raster image doesn't take the margins into consideration and starts always at the point (0,0) as you can ...
1
vote
0answers
23 views

Tile server stops working

I built my own tile server and when I try to prerender zoom level 10 or 13 modtile/renderd just stops working (like when I press Ctrl + C in the terminal). The other levels work fine. OS: Lubuntu 14....
0
votes
0answers
39 views

How to anti-alias 3D projected contour lines, ArcScene is jaggy

I'd like to render some high quality contour lines in 3D. The image below was created in ArcScene. Note how ArcScene doesn't use any antialiasing, so the contour edges look jagged and nasty. Click on ...
0
votes
1answer
37 views

How to control polygon colour in hand-crafted Json for ArcGIS Desktop 10.3/10.4?

An app I'm developing needs to handcraft ESRI JSON to display simple polygons in ArcMap Desktop upon import. I want to specify color/transparency/outlining for the polygons in a layer and ideally ...
1
vote
0answers
66 views

Errors when trying to optimize OSM Tileserver

So I followed this guide to create my (very first) tile server. While the server works and we are able to serve tiles, when zooming in tiles take a long time (30s) to render. I'm attempting to pre-...
0
votes
0answers
40 views

How to serve multiple Map style for a single map tile server

I have made one OSM map tile server and using open carto tool to style the map. But I am in need to have multiple style for the same map tile server LIVE. Is this really possible? If yes then please ...
8
votes
3answers
2k views

How Can I Make QGIS Stop Blinking Every Time I Pan?

The way QGIS draws the canvas when panning is quite annoying. If I pan the map even a little bit everything goes blank for a second or two before the layers are drawn. It looks like this happens only ...
1
vote
0answers
158 views

Rendering a geotiff block with gdal and gdk-pixbuf - Some flaws in the result

I currently try to render a geotiff file with GTKmm\GDKmm (gdk-pixbuf). The file is a tiled geotiff with a block size of 256*256 and three rasterbands. The shortened gdalinfo output is: Driver: GTiff/...
6
votes
2answers
168 views

How to render Multi-Response GeoJSON tiles

I am using TileStache to combine and server multiple vector layers in a single Mutli-Response GeoJSON tile, which is basically all my individual tiles/layers (GeoJSONs containing either roads, pois, ...
3
votes
1answer
384 views

How to render tm2 projects

What are the options for rendering tm2 projects? As far as I know the open source Mapbox tm2 projects have proprietary data sources (like OSM Bright 2), thus they are of little use, but some other ...
1
vote
1answer
36 views

Is there any possibility to draw an editable map using OSM data?

I am a newbie on openstreetmap related developments, I need to build a web application using PHP or Python frameworks, that could draw map using OSM data. It should also allows to edit attributes of ...
4
votes
1answer
300 views

qgis 2.10.1. mac - geotiff singleband pseudocolor [duplicate]

i've installed mac version from kyngchaos including all required packages ... ... and just noticed the following: while windows version behaves like expected when trying to render an ordinary tif via ...
0
votes
0answers
29 views

QGIS 2.12 speed up redraw is not working (PostGIS vector layers)

I have about 20 layers. Most of them are PostGIS layers (no raster). All layers in the canvas of my Project are redrawn after every update (for example by paining the map window or switching the edit ...
4
votes
0answers
155 views

Creating a Vector Tile base map

I want to create a vector tile base map using my own shapefiles/postgis tables for use on a mobile primarily. By my understanding the process is divided into 3 main steps: Creating/slicing the data ...
0
votes
1answer
31 views

Improving Global Scene transition when changing location using bookmarks in ArcGIS Pro?

Using ArcGIS Pro 1.0.0 I have: Created a new project using Global Scene.aptx Switched the Basemap to National Geographic Navigated to and created Bookmarks for some countries of different sizes: ...
1
vote
0answers
30 views

QGIS rule-based categorization with multiple variables

There are a few questions which sort of touch on this, but I haven't found an answer that is easy yet. I have a database with several columns of metadata. The first column relates to a unique ID I ...
1
vote
1answer
21 views

rendering issue when viewing polygons in mollweide projection

Arc10.3, windows I am using and etopo bathymetry raster with various polygon, line, and point layers over it. One of my polygons encompasses the north pole. This polygon automatically created a ...
1
vote
0answers
22 views

QGIS: disabling point deplacement when zooming out

I have a project in which I have multiple sets of data at the same coordinates, so I'm using the QGIS point-displacement renderer to display these points. When zoomed in on the points this works ...
1
vote
2answers
114 views

How to make the white background of an RGB raster transparent?

I would like to show on my map only the reddish pixels of my raster layer. Said in another way: I would like to transform my white background into transparent background so I can see my other ...
6
votes
1answer
302 views

Can you set a QGIS print composer to render the map as default?

I have set up a number of templates for the print composer in QGIS. In the Print Composer, there is the option to have the map image displayed in 3 ways: as a blank rectangle with no updates until ...
2
votes
1answer
112 views

Disable antialiasing in GeoServer .png output?

I would like to completely disable antialiasing of polygon borders in Geoserver's WMS png output. The reason is because we do downstream colour remapping, and intermediate colours break that. This is ...