A commonly used method of lossy compression for photographic images
0
votes
1answer
57 views
Can you use a large file directory of jpgs for without georeferencing
I have a large map data set of 256x256 jpg images. The file directory is organized by /map_type/zoom/x/y.jpg. I have 12 zoom levels and each zoom level directory has 2^(2*zoom level) images.
I have ...
1
vote
1answer
85 views
Why are JPG files invisible in Georeferencer?
I want to georeference a jpg file (map) with QGIS 1.8.0 on a Windows 7 (64 bit) machine.
The georeference window opens, but the map is not visible.
When converting the jpg file into a tif file (e.g. ...
2
votes
0answers
138 views
Problem converting georeferenced jpgs to geotiff - image is shifted/warped
I have hundreds of georeferenced jpgs in ArcGIS 10 that I need to convert to geotiffs.
I'm trying to use GDAL translate to create geotiffs from them. Everything works great except that the ...
4
votes
2answers
155 views
How to drape a simple jpeg image over dem of some area?
How can we drape a simple jpeg image which doesnot have any geo referencing information over the digital elevation model in order to visualize it in 3D in QGIS?
3
votes
1answer
102 views
How to add an image to an existing data frame using Python?
This is the first time I am using Python on my own, and I have searched for this answer for a few hours with no luck. I am wanting to take a .JPG imgae and put it in a data frame. The image has to ...
0
votes
0answers
36 views
Associate media to gpx vector layer from Python Console
Essentially, I would like to have the description in the form of text annotations when i hover my mouse over the gps entry. And if i click the same, it should display the images.
So I started off by ...
4
votes
3answers
1k views
Converting a .jpg map into a shapefile
I have a .jpg map of a set of U.S. counties that were affected by a tornado. The map shades where the tornado passed through, resulting in some counties only partially experiencing the tornado.
I ...
2
votes
1answer
785 views
Android offline app to visualize GeoTIFF maps (or any well-known raster format)
I like to go to mountain, and got lots of GeoTIFF maps, which I can convert to other formats with GlobalMapper (JPG+JGW, ECW, ...).
However, I haven't found an Android app to:
- show these raster ...
2
votes
1answer
234 views
Problem with convert georeferenced jpg to geotiff
I'm beginner with GIS tools. I have jpg file with GPS data and I need reference this file to Microstation as georeferrenced raster.
I tried use function Raster -> Conversion -> Translate with defined ...
4
votes
1answer
536 views
Exporting map to jpg (multiple times with python)
I set symbology and exported each raster in my mxd (one by one) to jpg file. My script is ok and it works (it is shown at the bottom).
The question is: how can I customly set my legend? Now I have ...
2
votes
1answer
340 views
ExportToJPEG() arcpy script failure
I'm attempting to writing a python script that will automate exporting a set of stock maps to JPEG from their mxd files, and I'm having some strange issues getting there.
I've alternatively been ...
0
votes
0answers
69 views
White nodata values instead of black
I have a problem. I cut a map on tiles using gdal_csharp.dll library (working on gdal_retile.py script rewritten into C#). Everything works fine except one case. When I cut areas with nodata values ...
0
votes
0answers
207 views
can't add JPG files into QGIS?
I can't add JPG files into QuantumGIS. I get an error message "C:\Spatial_Days\Data\Working\AP_Coast_Export.jpg is not a supported raster data source".
I am using QGIS 1.7.4 Wroclaw with GDAL 1.8.1 ...
1
vote
0answers
38 views
I want to georeference jpg map without having any digitizing data? [duplicate]
Possible Duplicate:
I want to georeference jpg map without any digitizing data?
I have only a jpg map but dont have any digital data for georeferencing that jpg.So is there any way for ...
1
vote
2answers
1k views
I want to georeference jpg map without any digitizing data?
I have only a jpg map but dont have any digital data for georeferencing that jpg.So is there any way for georeferencing my map (like googlemaps)?
4
votes
2answers
141 views
Wavelet vs Discrete compression for imagery
What is the main reasons to choose wavelet (jp2, sid, ecw) instead of discrete (JPEG) compression methods for raster data?
Lets limit this question to aerial imagery and lossy compression.
Why ...
4
votes
1answer
279 views
Using PNG/JPEG Compression in GeoServer
Is there any use in setting the PNG and JPEG compression in GeoServer (Services - WMS - PNG Options/JPEG Options)?
The default is 25, but we heard rumours that having compression resulted in a time ...
1
vote
2answers
437 views
Converting from GEOTIFF to JPEG2000
I need to convert raster from one format to another (geotiff-->jpeg2000). First I tried with very simple workspace, having input geotiff and direct to output jpeg2000, but I got error message:
...
3
votes
2answers
204 views
ArcMap: Not scaling and/or rotating when exporting a map
I am writing a console application using ArcGIS (engine or desktop). I'm trying to rotate and scale a map based on a polygon, and I'm not having any luck at all. With some tinkering, I can usually do ...
1
vote
1answer
149 views
Which is the best Android tool to visualize JPG+JGW images?
I've got some georreferenced JPG+JGW images, and would like to visualize them on my Android device. Which is, in your opinion, the best tool?
I've tried OSMdroid (after converting JPG+JGW with ...
3
votes
3answers
2k views
how can i import georeferences photos (jpg , kml, kmz) in QGIS/ ArcGIS?
I´ve got several georeferenced digi-photos as jpg, kml, kmz
How can I import those into my GIS projects(QGIS or ArcGIS) so I can open them as a popup or so?
2
votes
0answers
155 views
Importing Rasters to ArcSDE 9.3.1 using sderaster
OK, I am trying to import a raster to 11g using the sderaster command. It is a stand alone jpg with a world file associated, and pyramids.
Am I right in assuming I cannot import a JPG, I can only ...
8
votes
6answers
702 views
How do I generate thumbnails images from lots of shapefiles?
A colleague and I recently released an Open Source project called Mapoteca which is a set of Python Scripts that integrates with a GDAL/FWTools installation allowing a full walk-through of directories ...
1
vote
2answers
1k views
Hyperlink relative paths to files in points layer in QGIS?
I would like to add hyperlinks to each point in a points layer in QGIS 1.7.0 running on Mac OS X 10.6.7, but I have several requirements:
(1) Each hyperlink has to be a relative path to the linked ...
1
vote
2answers
187 views
Setting Rasters to the exact same display
I have been tasked to make a series of .jpeg outputs of different sections of a dike displaying elevation data.
My problem is that the data i have been given is GIGANTIC, almost the whole region made ...
3
votes
2answers
656 views
JPG file all black when added as raster in QGIS
I add a new raster layer in the latest QGIS and select a JPG file, but it is all black. I tried adding the TIF version of the same image and that worked.
What is it with the JPG, and how should I ...
3
votes
3answers
293 views
Can a raster map in GRASS be saved in JPEG/BMP format?
I'm trying to save a raster map in GRASS in jpeg/bmp format without using the GUI for d.out.file/d.save. Is there a script to do it? I tried r.out.gdal but it produced a map that is black and white.
