A bitmapped image format that employs lossless data compression

learn more… | top users | synonyms

1
vote
1answer
15 views

SVG to PNG in plugin code - python

I am making a plugin and what I want to do is display a preview of image in widget. I have previews saved as SVG files. I found a way to show it in plugin window but I must convert them to PNG first. ...
2
votes
0answers
20 views

Exporting PNG image with background transparency from ArcGIS Pro

I am attempting to export a PNG image file from ArcGIS Pro 1.2.0 with the background set to transparent. In ArcMap 10.3 this is simple, there was a button for setting the transparent color to white ...
0
votes
1answer
26 views

Convert TIF to PNG for Leaflet map

I have a single-band, georeferenced .tif file that I would like to display on top of a Leaflet.js map, using the ImageOverlay function. Unfortunately, Leaflet seems only to accept PNG or JPG files, ...
1
vote
1answer
51 views

Improving fuzzy PNG image used as company logo in ArcMap?

Why is my company Logo in the title block of my ArcGIS map blurry? The logo was inserted into the title block as a PNG image and appears blurry when I export the map to PDF.
0
votes
1answer
30 views

ArcMap suddenly started exporting massive .png files?

I'm exporting a very simple map. It has a single polygon shapefile on top of ESRI base imagery. There are several text boxes as well, but just simple Arial text. I'm exporting to .png at 220 DPI and ...
0
votes
0answers
26 views

Mapnik tiling speed help

I am working with a large series of jp2 files and need to mosaic and web map tile them. I would like to go form zoom 1-20. I am using mapnik to tile my images. Using gdalbuildvrt I was able to build ...
1
vote
1answer
135 views

Import PNG symbols in QGIS

I would like to upload some symbols into QGIS using version 2.14 (Essen). I would like to upload a PNG but it seems the only format available is XML. Do you know if its possible to upload PNG's ...
0
votes
0answers
61 views

Problem georeferencing PNG of floor plan

I am a student of GIS. I am working on PNG files of campus buildings' floor plans which we are georeferencing to satellite images of campus and then mapping safety equipment on each floor. After some ...
5
votes
0answers
113 views

How to fill composer map with canvas data and export composition as png using Python script in QGIS

I'd like to create a Python script in QGIS that will take some data (shp + tif, in my example), use tamplate Map Composer (from a file) and export created composition to a png image. With almost no ...
2
votes
1answer
114 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 ...
2
votes
1answer
334 views

QGIS Map Composer goes blank, outputs corrupt PDF

I am using 64bit 2.10.1-Pisa on Windows 10. When I set up my composer to print, everything looks fine until I try to print or export. The composer goes completely blank and outputs a corrupted PDF ...
0
votes
2answers
93 views

How to bulk load Picture Marker Symbols into .style for ArcMap

I have close to 1000 PNG files that I want to make Picture Marker Symbols stored in a .style file. I am very familiar with Microsoft Access, Python and ArcGIS and I know some C# and .NET. When I ...
0
votes
0answers
37 views

Name file based on column information, data driven pages

I am using data driven pages to export 300 maps into PNG-files. I would like to name every exported PNG-file based on information from a column in the attribute table. What is the code for that? The ...
0
votes
0answers
38 views

Custom pageSize MapFish Print not working

I am new to Mapfish print. I have a question . How to generate a PNG file with custom size. For example, generate a PNG file with width 1055 and height of 635. He was searching on the the mapfish ...
0
votes
0answers
30 views

Data Driven pages in Data View? [duplicate]

I know data driven pages only works in layout view, but is there a similar tool/method in data view to export PNGs?
0
votes
1answer
71 views

highresolution images from geoserver get scaled down

I uploaded a 300 dpi png (2024x1012) as world image to my geoserver. The image/map is displayed as WMS layer on a virtual globe in an android app. Unfortunalty, the layer on my globe gets pixelated ...
1
vote
0answers
90 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 ...
0
votes
1answer
210 views

How to get a PNG image of a polygon with the corner coordinates?

How to get a PNG image of a polygon with the corner coordinates in a separate file? I have access to ArcGIS 10.1 and QGIS 2.8.1. I tried this: http://gis.stackexchange.com/a/30503/50606 , but I get ...
2
votes
1answer
551 views

OpenLayers3: How to show a KML layer with the export to png Button

so... I have this script: <script> //Script1: Script de criação do mapa. var map = new ol.Map({ layers: [ new ol.layer.Tile({ ...
1
vote
0answers
470 views

create image out of geojson (gdal_rasterize?)

Short version: I need to know how I can convert a .geojson-file to an according .png-file (or any other image format) long version: I have a .geojson which was created by gdal_polygonize from a .png ....
1
vote
0answers
114 views

QGIS Atlas generation - Export atlas as images - only JPEG, want PNG

I can't find an option to choose image format while exporting Atlas, choices are Export atlas as images / as SVG / as PDF The dialog that opens has no options and it always exports as not so good ...
0
votes
0answers
102 views

ERROR 6: The PNG driver does not support update access to existing datasets

I was trying to overlay a shapefile to some raster images from a directory using gdal_rasterize. But then encountered this error ERROR 6: The PNG driver does not support update access to existing ...
3
votes
1answer
716 views

How to save the Map Canvas as PNG with transparent background programmatically?

I wrote a script to create a big number of heatmaps for a given scenario. I would like to save the result of every heatmap as a png image. I have figuered it out doing it with simple Map Rendering but ...
0
votes
1answer
181 views

Converting raster presented in KML to polygon using ArcGIS Desktop?

I have spent quite a lot of time Googling which brought me many places including this site, but I haven't found the resolution. I have a KML that presents a PNG. Radio Mobile generated the files and ...
0
votes
2answers
134 views

Why are my transparent png tiles showing up weirdly in QGIS?

I have Ubuntu 14.04 running QGIS 2.6. I'm loading a raster layer, but the transparent PNG shows up poorly. The black lines along roads aren't showing up and the anti-aliasing looks off. I'm thinking ...
0
votes
1answer
50 views

Transforming a PNG from RD_new to WGS84

I got the request to transform a PNG in RD_new to WGS84. Is this possible? I was thinking of changing the accompanied world file its coordinates. I do not think it is possible to load in a png in a ...
0
votes
2answers
472 views

OpenLayers: png as external graphic marker

I would like to style my point features. For some markers I use the convenient OpenLayers.StyleMap options, for few of them I would like to use an external png graphic (the camouflage circle). I use a ...
0
votes
0answers
42 views

Files generated with QGIS are invisibles for my system (windows 8.1) How can I Solve this?

My use of QGIS is basic but very important in my job. My final product usually is a Cartographic map (PNG or BMP image). Since the last updated (QGIS 2.6.1 Brighton) I have problems with every file ...
0
votes
1answer
109 views

eliminate small polygons of a PNG with gdal_sieve

I want to eliminate polygons wich consist of less than 3550 px in this PNG . I tried using gdal_sieve but there seems to be an error. gdal_sieve -st 3550 E8.png -of PNG E8sieve3550_4.png ERROR 6: ...
0
votes
0answers
113 views

PNG from Geoserver size on Google earth seems uncontrollable

I have set up a geoserver instance that hosts a lot of data that we process at work. It seems to be the easiest way to distribute since I can provide a simple network link to the geoserver so that ...
3
votes
2answers
2k views

Exporting GIS Images with Transparency

I'm trying to export some images of Gulf of Mexico infrastructure that will later be used for non-GIS purposes as overlays onto sea current/weather maps (likely in photoshop). I have no clue how to ...
0
votes
1answer
53 views

gdal_polygonize unable to open PNG

I use OSGeo4W on Windows 7 (64 bit) and included libpng16.dll When I try C:\OSGeo4W64\bin>gdal_polygonize star.png bla I get the following error: ERROR 4: `star.png' does not exist in the file ...
1
vote
0answers
90 views

Extract polygons of PNG with GdalOgrInJava

I have PNG pictures with polygons of different colours on them. What I plan to do is to extract these Polygons using the polygonize function (see here) Then I will try to encode the polygons in ...
1
vote
1answer
3k views

Convert PNG to GeoTiff using GDAL

I have a map portion PNG and its associated PRJ file. I want to convert the PNG to a GeoTIFF. I know how to convert a PNG to a GeoTiff if the bounding box is available: gdal_translate -of Gtiff -...
1
vote
1answer
609 views

Add kml file with associated png images as openlayer layer

I have private sonar data in kmz format, and can easily produce more. I understand that OpenLayers cannot use kmz files, so my question is if it can handle the uncompressed kml file with all the png ...
2
votes
1answer
1k views

How to insert georeferenced PNG into correct location in AutoCAD Map3D?

I have a PNG of building plans that I will need to digitize in AutoCAD Map3D. I have georeferenced the PNG in ArcGIS, which has produced a world file (.pgwx) in the same directory in which the image ...
2
votes
1answer
137 views

Efficient way to provide cached tiles? [closed]

I am creating an app in Android that requires cached areas. I allow the user to cache an area of reasonable size. The server provides these tiles in a zip in the format /z/x/y.png. I took a (very) ...
1
vote
1answer
1k views

Where can I find a good Mbtiles to png tiles converter?

I'm trying to create a slippy map and I need to obtain png tiles. I have exported a .mbtiles file from TileMill and I tried several python scripts to convert this file into png tiles but I always end ...
0
votes
1answer
159 views

Georeferencing PNG against Google maps with openlayers plugin

I am trying to georeference blueprints to the footprint of a building. I'm using the Google Satellite image from the plugin to do this. The blueprints are rotated about 30 degrees. When I run the ...
1
vote
0answers
298 views

QGis, how to overlay and correctly position and scale a KML and image onto a Google base map

Being totally new to the entire GIS subject I managed to install and get runnning QGis (2.2.0 on Mac) properly, get my Google Maps showing (I set the the CRS to WPSG:3857) and I also got my KML file ...
1
vote
0answers
114 views

using gdal2tiles 2 tile a png longlat. keep getting wrong coordinate box in google kmls

I have tried lots of variations, but can't seem to get gdal2tiles to do what it used to do. Prior version? images are 60N to 60S and 180W to 180E 9000 pix x 3000 lines. gdal2tiles keeps outputting ...
0
votes
0answers
130 views

Fantasy map, how do i slice large png and georefrence it the right way?

Im and IOS developer working on a map based ios game, and new to GIS stuff. I've read a lot of info and i started to get a hint about what i need to do in order to meet my goals. I have a png map i ...
2
votes
2answers
461 views

Export to Mapbox (TileMill) from PSD (or SVG/PNG)

Newbie question: I designed a map (not Earth-related) in Photoshop and I want to use something like Mapbox to serve the map and make it dynamic (bounding boxes, zoom in/out, etc). How can I go from an ...
0
votes
1answer
1k views

How can I correct a .pgw file for a PNG image?

I have a PNG file and I need its .pgw file to be set with NAD 83 as the projection. I have created a .pgw file: 799 0 0 -799 -122.562 37.1946 However when I open the PNG in QGIS or ArcMap 10.2 it ...
2
votes
2answers
600 views

Where to find Icon library for custom GIS software?

I am building a desktop application and currently utilizing a mix of icons for pan, select, zoom, attribute table, etc that have been randomly taken from the internet and modified. The overall look ...
3
votes
2answers
1k views

How to use user made png/jpeg icons in QGIS 2.0?

I can only add svg icons in qgis 2.0. How can i use png or jpeg or gif images as icons in qgis2.0?
1
vote
1answer
502 views

Map Layout Elements In New Layer Automated Using Python

I was wondering if there was a way to put a title and integer data from an attribute table in a new layer created in Python. I was able to create a new layer using copy features, zoom to the selected ...
3
votes
1answer
2k views

How can I get the GPS info from a PNG?

I am trying to get the GPS data from several hundred PNG photographs for display in Q GIS (so need to access the EXIF data). The online and downloadable viewers I have tried haven't yielded much ...
3
votes
2answers
4k views

Exporting mxd to image with transparent background from ArcGIS for Desktop?

I cannot get ArcMap 10.0 or 10.1 to "Export Map" to a png or gif with a transparent background -- no matter what I set the background and transparent colors to. Thus, I created the following script, ...
2
votes
1answer
1k views

How to generate JPEG tiles using gdal2tiles.py

I am using gdal2tiles.py to generate tiles and packing it into MBTiles using mb-util. gdal2tiles by default generates PNG tiles. When I convert PNG tiles to JPEG large black area around tiles are left ...