Questions tagged [tiles]

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

200 questions with no upvoted or accepted answers
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111 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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432 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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2k 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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86 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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235 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 ...
4
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5k views

Uploading Service Definition Failed

Can anyone give me direction as to possible reasons why when publishing certain map services I get the "Packaging Succeeded but Publishing Failed" error? When I expand the Geoprocessing Results ...
4
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700 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 │ └...
3
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1answer
343 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....
3
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234 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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36 views

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 ...
3
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636 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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425 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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132 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? ...
3
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144 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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0answers
158 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 ...
3
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214 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 ...
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156 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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301 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 ...
3
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330 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
310 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 ...
2
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0answers
43 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 ...
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24 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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61 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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405 views

Setup mapnik: tile generation very slow

I've setup a Mapnik tileserver with this steps: https://switch2osm.org/manually-building-a-tile-server-18-04-lts/ This are the specs of my server: OS: Ubuntu 18.04 LTS 8 vcpu's 28 GB RAM I've ...
2
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0answers
108 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 ...
2
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0answers
471 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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187 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
362 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
266 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,...
2
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0answers
455 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, ...
2
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668 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 ...
2
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0answers
280 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 ...
2
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0answers
151 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 ...
2
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0answers
81 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
119 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 ...
2
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0answers
349 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
106 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
195 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
822 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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0answers
563 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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0answers
1k views

Geowebcache bounding box to tile conversion is not working properly (EPSG:4326)

I am trying to make Geoserver and built in Geowebcache work together. I have a page with google maps and I am rendering images from a published WMS layer using getTileUrl function. Unfortunately I am ...
2
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0answers
195 views

How to optimize color ramp for terrain

I'm working on a project to highlight LiDAR terrain on the web and part of the idea is to show the detail of the data at large scales. I've already read through the excellent Mapbox guide and I've got ...
2
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0answers
1k views

Splitting a bounding box into n amount of bounding boxes

Firstly, I've never worked in the GIS area before nor do I have much knowledge of the mathematics behind some of the stuff I am trying to implement. Perhaps i'm getting in over my head. My Situation ...
2
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0answers
112 views

How can I figure out whether a sphere is intersecting the Earth between a given lon/lat range?

Given a lon/lat range that represents a tile on the Earth's surface, I need a computationally efficient way to figure out if a spherical volume defined by a point (assume ECEF coordinates) and a ...
2
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0answers
330 views

efficiently slicing tiles with gdal C API

Im working a project using the gdal C api(in a block of objective-c) to slice TMS style png tiles. The code currently works, but I'm running into some trouble optimizing to run fast enough for use on ...