Questions tagged [tiles]

A collection of image files each containing a section of a map, or remote sensing scene.

217 questions with no upvoted or accepted answers
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119 views

Issues with atlas generator and labelling across maps/images

I have a lot of layers in my project and I am trying to use the atlas generator in the print composer to create a tiled map. Some of the layers have labels which have different configurations with ...
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574 views

Construction of R-tree data structure for tiling polygon vector data

Because it is better for irregular distributed data, I want to create tiles using r-tree for my dataset. My dataset consists of 1214 polygons which represents building foorprints. After doing some ...
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878 views

leaflet returns wrong {x} {y} tiles from arcgis mapserver

I'm trying to add a leaflet map to an Angular 2 project, which shows a layer from an ESRI mapserver as a tileLayer. As such: ngOnInit(): void { let map = L.map('map', { crs: L.CRS....
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3k views

What is the fastest version of gdal2tiles?

I have multi-CPU linux server, so I wonder what is the fastest parallel version of gdal2tiles.py ? My Ubuntu version: lsb_release -a Description: Ubuntu 12.04.5 LTS How I install the package: ...
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102 views

Correct planet radius, for calculating metres per pixel?

I am putting together some code to create tiles from various maps, for various planetary bodies, but I am not sure which value of planet radius I should be using, for indicating the metres/pixel ...
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253 views

OpenLayers 3 support for WMS 1.3.0 CRS:1

I am trying to get a TileWMS layer working with the Coordinate System as CRS:1 defined in WMS 1.3.0. By defining the right projection stated in CRS:1, axisorientation as 'es', I could get it working ...
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1k views

Buffering a Raster with GDAL and Numpy

I am using GDAL to convert a raster dataset into a numpy.array and then using numpy to buffer the data in the raster. For example, I need to know all the regions within 100ft of a school point ...
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712 views

Map with custom tiles having uncommon EPSG

I've produced with mapnik my own tiles with EPSG:31256 on a shapefile. I've structured the tiles in a OSM-like tree: zoom/x/y.png, with zoom from 0 to 2 and, x y starting from 1: tiles ├── 0 │ └...
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759 views

Fast Dynamic MVT generation

I am trying to migrate from serving static MVT to generated on the backend by PostGIS with ST_AsMVT(). Or find a way of minimizing the time of building MVT from the database. I have a dataset of ...
3
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2answers
927 views

Basic Authentication in Leaflet

I'm using Leaflet to display map tiles. The map tiles are loaded from a different site using basic authentication. So the url template looks like this: L.tileLayer('https://username:password@example....
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297 views

How to fill missing high zoom level tiles from MapServer WMS?

I'm creating image tile pyramids (format = MRF) which do not contain all possible tiles at high zoom levels. This is because in some areas the high zoom level tile does not exhibit higher resolution ...
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SPOT and LANDSAT images on the same grid

Let us introduce ourselves, we are a GIS team of the Cartographic division of INDEC (the national census bureau of Argentina). We are working on the next national Agricultural Census 2018, which will ...
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549 views

Math domain error in slippy tiles generator

I'm running Alexander Hajnal's Python module (http://alephnull.net/software/gis/tile_writer.shtml) in QGIS (2.14.3, Win10 64) and I'm using the EPSG:3857 as crs. I got this error: "Traceback (most ...
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144 views

Avoid multiple labeling in qtiles / QGIS

After failing to start the slippy map tiles generator .py module (where to put globalmercator.py...?), i tried this plug-in. How can i set qgis(2.14), to not move labels, as the tile generator moves? ...
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182 views

Blending edges of tile overlay

I am working on a web map using Leaflet and am using purchased satellite imagery as the base map. We want to limit the extent of the high resolution image to the area of interest, so I have resampled ...
3
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159 views

How to determine scene tile's x, y and z on tile server?

At the core, I would like to get part of scene from planet labs tile server (png image). In short, what is the math between (long, lat) coordinate in EPSG:4326 to tile (x, y, z) values? Planet Labs ...
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182 views

Forcing gdal_retile to produce full tiles when original file's size is incompatible?

I have a set of large geotiff (DEM + orthoimagery) that I need to generate image pyramids from. So far gdal_retile from osgeo4w is working very well for my use case with one exception: I need all my ...
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253 views

Applying unified color scale to tiles with gdal2tiles?

Background: I have a series of about 40 small GeoTIFFs that need to be merged together to make one large image. Each GeoTIFF has 2000 bands. I've tried using both gdal_merge and gdal_retile to pull ...
3
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159 views

Data format for offline apps on iPad?

For an iPAD application (based on WhirlyGlobe) we've two modes: offline and online. It's a meteorological application so each day around 1600 layers (worldwide) per day are created on the servers. ...
3
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335 views

ArcGIS Split Raster tool results in black rasters

I have a rather large raster that I am trying to split into small tiles in PNG format to upload to Autodesk Infrastructure. I came across the Split Raster tool and thought it would do exactly what I ...
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363 views

Generate tiles using GPU

I was wondering if anyone has tried already to utilise the GPU in tile generation? I have a quite big dataset so tile generation takes a while (especially on high zoom levels) even on a quite high ...
3
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0answers
321 views

GeoServer + ImagePyramid: Request is empty where data exists

I have set up an image pyramid based on 5 levels of tiling. The data is served using the ImagePyramid plugin for GeoServer. When I do a layer preview the data is visualized just like I expect them to ...
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36 views

Conversion of height systems

If I have a vector dataset with XYZ data and convert it with QGIS from EPSG:31468 to EPSG:4979, for example, and the heights (z) are based on EPSG:31468. Will these values also be converted to the ...
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72 views

PostGIS how to use ST_Retile

How do you properly use ST_Retile https://postgis.net/docs/RT_Retile.html there are no directions for it tried: update slopes.dem_slope set rast=st_retile(rast,100,100) and select st_retile('...
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36 views

QGIS 3.x: Show only labels / TilesXYZ TileLayer of labels only

I'm using QGIS 3.6 and the TilesXYZ extension (deprecated for 3.8+) to export tilelayers of my map. I'd like to export a base layer without labels and a label layer to show on top of features. The ...
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30 views

Creating custom tiles from information of a node-link graph?

For my thesis I want to visualize node-link graph in form of a Web GIS. The graphs consist of up to 30.000 nodes and edges. I am new to GIS, completely overwhelmed by the tools and techniques and do ...
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328 views

Requesting Styled Google Maps XYZ tiles with QGIS seems to ignore colors

At the time of posting this question unauthenticated requests for Google Maps tiles work. E.g. the following URL scheme would correctly load the tile shown below https://mt1.google.com/vt/lyrs=r&...
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71 views

Unifying color scale of different tiles in Google Earth Engine?

I found some other posts asked the similar questions but in different tools like ArcGIS, GDAL, QGIS etc. What I want to ask is how to do this in GEE. Now I have removed the bad observation pixels (...
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142 views

What would cause a Cesium 3D-Tiles tileset to not even request it's content?

I am generating an I3DM through Python. I know that the I3DM is probably ok, since the 3d-tiles-tools allow me to extract the binary GLTF file from it. However, when I go to render the tileset in ...
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186 views

Creating tiled pyramidal TIFF from PNG tiles that are organized in slippy map?

I have map tiles (Z/X/Y) of a certain location which I serve via a simple web server and add on QGIS for offline usage via the XYZ Tile Layer from the Browse menu. These are to be used in a survey of ...
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0answers
69 views

Georeferencing xyz layer from Griffiths Valuation of 1850s?

I have made progress on my project to map land and property owned by individuals in 1850 in Ireland using Griffiths Valuation maps. I used http://griffiths.askaboutireland.ie/gv4/single_layer/tiles/{...
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144 views

Generating map tile for ol.source.xyz?

I'm trying to create an OpenLayers online map, using QGis/PostgreSQL(PostGIS) to collect data sets and style the map, and then deploying it online. I previously deployed using PostGIS, GeoServer and ...
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0answers
609 views

Generating tiles from matplotlib plots

I have a number of analyses that are being plotted as heat maps in UTM coordinates using matplotlib. I'd like to generate tiles from these to display on a leaflet map over top of an OSM map. At this ...
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0answers
397 views

How to use L.singleTile plugin in Leaflet

I am using Leaflet (leaflet-0.7.3) to publish a WMS layergroup from GeoServer. My code is: var basemap2 = L.tileLayer.wms('http://localhost:8080/geoserver/ows?version=1.3.0&', { ...
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0answers
584 views

Integrate Google Streetview map into QGIS?

I'd like to show a the Google Maps layer that has the routes that streetview has taken in my QGIS 2.18.x project. I'm not looking for the actual street view imagery. I've seen multiple posts about ...
2
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0answers
299 views

Increase rendering speed for the data coming from MSSQL for showing in Leaflet

I have some polygon data which are coming from MSSQL server. Getting these data takes about 5 seconds and I have about 1600 Polygons. I would like to show a popup for each polygon (by clicking on them,...
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0answers
515 views

Get Modis tile from lat long

I'm trying to get the MODIS tile that I need, I can get it using online calculator http://landweb.nascom.nasa.gov/cgi-bin/developer/tilemap.cgi but I need to get it in code. How I can convert lat, ...
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728 views

OSM tileserver on Ubuntu 16.04 - renderd doesn't start on reboot

I have been able to setup a simple OSM tile server on Ubuntu 16.04. I followed this brilliant tutorial and also made some notes of my own. This works alright but whenever I reboot the system renderd ...
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0answers
359 views

Calculating extent of custom tiles?

Problem The picture is just an example of my case, but I am left with blank space on the left when I load all the tiles and I get error message in the console: Failed to load resource: the server ...
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0answers
165 views

QGIS Qtiles from EPSG 3395

I am having issues while converting my layer from 4326 to 3395. My Qtiles does not make tiles. I have a source mapinfo in 4326 with long, lat pairs. My goal is to show this on a maps.yandex (3395 ...
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87 views

Image pyramid with transparent pixels

I have a GeoTiff image which I wan't to use to build tile pyramid and serve it via geoserver. In most cases it works well but fails to publish a layer if tiled images have NO_DATA (transparent) pixels....
2
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0answers
373 views

Example for creating tiles from image for use in mapbox-(gl)-js

I'm facing weird random tile selection issues (like floating precision causes a wrong tile to load) when using some existing static tile data with mapbox-gl-js. I'm therefore searching for an ...
2
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0answers
113 views

Fixing undesirable lines between tiles from SRTM contour line extraction?

I'm trying to make a South American topography map based on SRTM data on QGIS. The problem is a visual one. If the topography contours are extracted from individual SRTM tiles, it results a little ...
2
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0answers
208 views

TileStache PNG Optimization

A Tilestache config file has a "png options" object that passes its config straight through to the Python Imaging Library (PIL). Setting optimize: true does some kind of optimization as the file is ...
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0answers
1k views

OpenLayers 3 xyz layer problem

I'm going to host a customized xyz tiled layer so I tested on my local machine to add that layer to OpenLayers Map control. I've already rendered some tiles using generate_tiles.py and Mapnik. I've ...
2
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0answers
2k views

Using nginx to serve tiles

I created a map in Tilemill, exported to mbtiles, and created a cache of tiles using TileStache. Until now, I have been using Apache as a reverse proxy for TileStache to serve the tiles, but I'm ...
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0answers
862 views

How to split a raster into x tiles that overlapped by x km?

I have a raster that I split into three tiles by using the function Split raster in ArcMap as follows: How can I split my raster into three tiles that overlap by 2 km as follows : ?
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593 views

Caching layers on the fly and seeding combination

I have created a map in geoserver Im am using geoserver 2.5.1 with the intergrated geowebcache. The map seems to be working fine and the seeding also seems to be working fine provided I don't use a ...

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