A representation or description of a scene, typically produced by an optical or electronic device, such as a camera or a scanning radiometer.

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0
votes
3answers
807 views

How to add png image with esri javascript api MapImageLayer Class?

I have a png image that we host that I need to resize and overlay onto a map at specific gps coordinates. Would this be an image class? I can't seem to find any examples that match up with my needs. I ...
0
votes
0answers
36 views

Ignore Transparent Pixels for Bounds Determination

I am displaying an Image using GWT OpenLayers on a map. My Image has transparent pixels and the system which returns my Image returns a footprint that is equal to the image plus the transparent ...
1
vote
1answer
85 views

How to convert jpgs to RST for IDRISI Selva Image Processing

I would like to create a mosaic data set in IDRSI Selva however, my images are jpg. Is there a way to convert these within IDRISI or otherwise? Thanks.
2
votes
1answer
133 views

Create image (TIFF/PNG) from geodetic (lat/long) data

Using Java, I need to render a bunch of geodetic data to an image, ideally TIFF or PNG. Specifically this is weather data, with each sample having a latitude, longitude, and amplitude value. I'd like ...
2
votes
0answers
75 views

Flood extent extraction from satellite images

How i can extract the floodwater from satellite images? Is the image classification method accurate for moderate-resolution satellite (Terra/Aqua MODIS)? Or is there a more accurate methods? Thanks.
1
vote
1answer
170 views

Can I edit pixels values of an image with GDAL?

There is a method with GDAL (used in C/C++) to edit pixel values of a georeferenced image, maintaining the original file? Or I have to create a new dataset? My goal is to maintain ALL originals ...
1
vote
1answer
225 views

Why does Exporting Document to JPEG using ArcObjects in Layout View result in bad picture quality?

I want to export the Active View with ArcObjects to JPEG. All Layers in the Document are raster layers (GeoTiff). I use this code which works quite well when in Data View, but when I perform the same ...
3
votes
5answers
1k views

Automatically download and merge webmap tiles into one big image?

Is there an easy way to download a bunch of web map tiles (in /z/x/y.png format) and stitch them together into a single large image? I could probably script this using ImageMagick, but would prefer ...
0
votes
0answers
116 views

how to calculate the right resolution for an image overlay in openlayers

I have an image I use as overlay in a vector layer in my openlayer web application. The idea is the same as showed in the example you can find here: ...
1
vote
0answers
136 views

How to retrieve latitude/longitude from Tiff with Geotools

I am new to Geotools and I have to work on project which includes a set of tiff image maps. In that I need to get latitude/longitude for a given point. Ex: When mouse click occurs I want to get the ...
2
votes
1answer
106 views

How to determine if an image file is georeferenced

I have a task to scan a folder for georeferenced images. There might be a lot of images, some quite large, and some not georeferenced. The spatial information can also be either embedded or in a world ...
1
vote
0answers
91 views

Free cartographic texture resources

I've been trying without success to find free textures to use in TileMill. I'm looking for fairly simple, abstract textures, like a dotted pattern (to indicate national parks). Are there any well ...
7
votes
4answers
258 views

How to compare areas in scanned historical land use maps

I am a relative beginner to using GIS, and am running QGIS 2.0.1 in Linux. I have two historical maps which I want to analyze, that show land use patterns in the same area at two different moments in ...
2
votes
0answers
78 views

Adding dynamic picture elements to mapbook [closed]

I have a feature class full of traffic signal data including up to 3 pictures of each traffic signal. I want to create a series of data driven pages that include 3 picture/data frames that ...
5
votes
2answers
322 views

10 GB Raster Aerial Image in Quantum and POSTGIS

I have a problem... I have been successful in uploading the raster in postgis but when I access it through Qgis. it does not open even after several hours. I have 10GB aerial image raster and ...
0
votes
1answer
138 views

How to import a simulation from ParaView to ArcMap?

I made a simulation and reworked the output with ParaView. I simulated an avalanche on a DEM and what I want to do is to compare the area of the simulated avalanche with that of the real avalanche. To ...
0
votes
2answers
129 views

Can Vector grid shape file be clipped with Satellite image in qgis?

I am working in open layers plugin in Qgis . in order to project the satellite image wit respect to vector shape file i am having, Andre Joost suggested me to create a vector grid with crs sysytem of ...
7
votes
2answers
462 views

How to Georeference Photos With No Spatial Reference?

I have about 100-200 field ground shot photos I would like to overlay in ArcGIS 10 that have no spatial information which I need to somehow develop using a photogrammetric formula. The camera was ...
3
votes
2answers
650 views

circle detection on binary image

My image is gray scale image which i have converted to binary by smoothing and then edge detection method. Now i want to place the circle /ellipse on edge detected. I don't know how to proceed ...
3
votes
2answers
213 views

How to create georeferenced and projected data from hand-drawn map?

I am preparing datasets for students in a spatial statistics course for a module on spatial autoregressive models. We will use ArcGIS 10.1. The first dataset will correspond to a mythical ...
1
vote
1answer
66 views

Is there any “proper” way of setting the viewport for QGis Time Manager?

I'm working on video visualisation for some geo data. Everything works fine for me except the viewport that the time manager plugin is using for image frames. It makes image frames size of actual map ...
1
vote
2answers
832 views

Merging many rasters using Python

I have a list of many many rasters. I want to have a simple and easy to understand script that takes this and merges it into one big mosaic. I found a similar question but the accepted answer adivises ...
1
vote
0answers
67 views

proportion of image layer in OL

I tried create map with single image used OL. But I have a trouble: image in map has a wrong proportions. Img: 1540 x 1481 Img in map: 2858 x1481 My js code: $(function (){ var map = new ...
0
votes
2answers
259 views

QGIS 1.8 crashes when exporting from print composer to image on Windows 7

My question is similar to QGIS Crashes when writing to PDF. Today, when I try to export to image, QGIS crashes. I've tried opening a new composer to no avail. This is the problem signature: Problem ...
2
votes
1answer
127 views

Determining the transformation between a satellite image and long/lat

I'm trying to overlay some data onto a satellite image of the UK. The image is a hi-resolution version of the image below (originally from dundee university): ...
1
vote
1answer
712 views

How to add images in CartoDB infowindows

Can't seem to get the default site to display images. I've added hrefs to a image column. example; I've dragged the image column to the top of the infowindow sidebar app and it still just displays ...
0
votes
0answers
239 views

Open Layers override class or method in Android 2.3

I'm implementing my own image loading mechanism for openlayers, because lack of functions in android 2.3 webview. It will get cached images from android db. I wan't to override ...
1
vote
0answers
195 views

Question for MOD35 cloud mask

I have a question about processing MOD35 cloud mask image. I worked reprojection on MOD35 cloud mask image using MODIS Swath Tool. The processed results of MOD35 cloud mask are consist of 6 band ...
2
votes
1answer
395 views

How to Determine to world map size in pixel given this data?

How to Determine the world map size in pixels given this data? Map size of a particular area say, for example: Makati city, Philippines with bounds: Top-Right: 121.0281, 14.56497 Bottom-Left: ...
3
votes
1answer
420 views

Relative Hyperlinks in QGIS without end user's software dependency

I am trying to work out how can I add a relative path hyperlink to a shapefile in QGIS. I have found several great tips on various forums but only one has so far potential to be implemented. The ...
3
votes
1answer
54 views

How to load multiple images with the same CRS?

When I add several images to QGIS 1.8 it asks the coordinate reference system for each one. There are several seconds in between the dialog and it is not easy to just continue working as the dialog ...
2
votes
2answers
1k views

Is it possible to add a simple image or graphic to the map canvas?

Is it possible to add a simple image or graphic to the map canvas in QGIS (e.g. a symbol marker)?
4
votes
2answers
331 views

How do I Capture GDAL projection and create matching output (OGR or GDAL) shape files?

Working in C++, using GDAL and OGR: Depending on what the user has supplied for image input, I need to output point (or other) shape files in the same projection as the input raster images. The ...
5
votes
2answers
466 views

How to display a lot of images with OpenLayers?

I would like to display a lot of images at same time. The images are georeferenced (they have extents), with some labels on top of it which, on click, open popup. I can not say how many exactly ...
1
vote
0answers
130 views

How to correlate Image DN with Spectrometer reflectance?

I am trying to develop a system to measure NDVI from the commercial grade digital camera. I am trying to get two bands NIR and RED from the image and apply it for NDVI measurement using diffent ...
3
votes
2answers
847 views

How to save MapServer output to a file?

How can I save the results from a MapServer file as an image? I would like to be able to write a png file as a result of a query. My query which I can display in browser is the following: ...
3
votes
1answer
236 views

ESRI/ArcGIS draw protractor

I am using ArcGIS maps and trying to follow JS API. I am trying to understand how can I add a protractor on the map which will help in angles while drawing polygons. I understand I could add a Feature ...
4
votes
0answers
567 views

I have a Web Application (ASP.NET) made ​​in ArcGIS Server Manager. How to create a button for the user to export his vision for PDF / Image?

I am using ArcGIS Server Manager to create Web Applications (ASP.NET). I would like the customer to access has an option to export your vision to PDF or Image, or both. I would like to generate the ...
3
votes
3answers
922 views

Merge DEM and Hillshade to create one file?

I am wondering if I could merge DEM and Hillshade ? What is the pro and cons for that? Thanks
4
votes
2answers
157 views

What Information Does the Blue Band Provide?

I am playing around with ERDAS and was implementing image difference on two rasters separated by interval of time. I was using a blue band raster and I created a default threshold for percentage ...
2
votes
1answer
1k views

Convert X Y Pixels to Easting Northing

Hopefully someone can help. I'm trying to find out what the formula would be to convert the X, Y of an image to the Easting and Northing coordinates. I've downloaded some of the raster maps from OS ...
2
votes
0answers
506 views

Automated testing for GIS apps

There are several commercial and opensource tools for regression automation. While many of them could be employed to test GIS apps, they fall short, at times, dealing with the unique characteristics ...
0
votes
1answer
527 views

How to define image map with pins in Javascript?

I have image map in .png format. All I need to do is to add a sidebar where users click on for example "restaurants" and pins with restaurants will show on an image map. When user mouseover a pin, it ...
1
vote
2answers
2k views

How to display a image from Postgres database

I have Images in bytea form in PostgreSQL/PostGIS database, i want to display them in a webpage using PHP - PostgreSQL. I got lot of examples and I worked out but not getting output from them... Few ...
1
vote
1answer
1k views

Export georeferenced image into Google Earth

I have created a georeferenced image as instructed in this fine tutorial: http://qgis.spatialthoughts.com/2012/02/tutorial-georeferencing-topo-sheets.html Now I would like to get this image into ...
2
votes
1answer
137 views

Adding images to placemarks multiple times

I have a route that I travel that is saved by coordinates to a .csv file for use in GE. I have images (pictures) that I would like to add to placemarks I have along the route. Is there a script or ...
0
votes
1answer
222 views

how to integrate external image processing programs within ModelBuilder

I want to use python libraries to do image processing for very large files (over 2GB), but the current python libraries can not read 16 or 32 bit image correctly. At least, I tried Python Image ...
6
votes
1answer
1k views

Creating a mask with transparent pixels in python

I have a geotiff image with pixel intensities ranging between certain values. Lets say bewteen -2 and 2 (the image is normalized). I have a certain threshold which interests me, lets sat 1. I would ...
2
votes
1answer
601 views

How to have a layer with many images that scale?

I know that in OpenLayers you can add Features to a Vector Layer which each have image but then they will not scale (i.e. their size stays the same independent of the current zoom) or at least I do ...
2
votes
1answer
774 views

Added PNG dissapears when I export/print map

Ive added a PNG image of a chart to my map and when i try to export as any image file or print the map the PNG image is not there. Im using arcmap 9.3. in layout view im adding image which ive tried ...