A commonly used method of lossy compression for photographic images

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139 views

How to save QGIS composer template with image - e.g. company logo?

I can't figure out how to save QGIS Print composer template with image. In our map compositions we always have company logo in one place. It is easy to add image (logo) to composer and place it to ...
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0answers
998 views

Create a jgw file for jpg image.

I converted ecw file into jpg file with IrfanView, to display the jpg as base layer in openlayers. I understood that I need to create a jgw file to display the jpg file. I found this example: ...
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0answers
39 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 ...
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3answers
203 views

Computing distance of a georeferenced .jpg to each polygon (town) in a shapefile

I have a .jpg that is a highway that spans multiple towns, and a shapefile with boundaries of these towns. I have georeferenced the .jpg so that it is aligned with the shapefile of the towns. My ...
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2answers
82 views

Convert jpg raster format to tif format

I have 120 rasters( jpg format ) and i want to convert them to tiff format to folder called "OtherFormat" in env.workspace with arcpy. In my code i try to convert all jpg file I read ...
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2answers
94 views

How to choose a coordinate reference system

I have a jpeg image of a reserve's layout and would like to use it to plot animals movements on i.e. GPS points. I have no idea which coordinate reference system to choose during the "georeferencing" ...
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1answer
45 views

What is default compress number for jpg2000 when exporting?

I have a file geodatabase that has 635 GB Imagery I copied from Mosaic Dataset. I am trying to export it to jpg2000 to a new file geodatabase. I am thinking what is the default compress number for ...
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1answer
33 views

How to add an image (jpg) to an existing layout using Python?

I have 1500 MXD whit the same template layout, and need insert other image for the al mxd thanks for your time. version arcgis 10.1
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1answer
57 views

Georeferencing jpg via Gdal_translate output a GIS tif 15.5 times bigger [duplicate]

Given as input a light 874kb jpg, I use gdal_translate -a_ullr (source) to reinject GIS georeferencing : -a_ullr ulx uly lrx lry : Assign/override the georeferenced bounds of the output file. ...
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1answer
62 views

QGIS processing does not support jpg

I would like to work with the gdal functions provided in the processing toolbox. It is easy to call: import processing processing.alglist() ...
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1answer
41 views

Same Image and Shapefile are not overlapping in ArcGIS for Desktop?

An image is Digitized in ArcView 3.3 with JPEG extension; But not with Image analysis extension. When I open that image and shapefile in ArcGIS 10.1 for Desktop then they are not overlaping each ...
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1answer
104 views

Saving Map on Server Side as Image File

I am trying to save my openlayers map on the server, following these instructions, the sections Client-side: Tile collection and Server side: PHP: ...
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0answers
22 views

Large Jpegs, handling in ARCGIS

I am working with 10s of large raster data, each one is from jpeg, around 65000x22000 pixels, I have a normal laptop, with 8 Gb of RAM and i5 processor. Can any one give me guidance on how do i make ...
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0answers
49 views

Where can i find Shapefiles of city along with the world file (.jgw) and the jpg image?

Are there any links where i can download a shapefile of a certain city along with aerial view jpeg image and the corresponding world file (.jgw) ? I need it to test an algorithm. Thanks,
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1answer
144 views

GDAL TIF to JPG Creates Dark Image

I'm using the GDAL Raster>Translate to create JPGs from Georeferenced TIFs. The translation is working, but the resulting JPGs are significantly darker than the TIFs they are being created from. ...
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1answer
226 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 ...
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0answers
657 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 ...
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1answer
150 views

Image Processing for vegetation detection using NDVI technique

I have a MODIS 250m resolution satellite image in jpg format.How do i do image processing using NDVI technique on it? Basically i have to detect vegetation for a 250m resolution MODIS image using NDVI ...