Imagery refers to raster based datasets acquired from sensors on satellites or aircraft.

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Black polygon covering aerial imagery in QGIS?

I am using FSA 2013 aerial imagery, which I access via WMS in QGIS. In some locations the imagery is covered by a black polygon. The polygon only displays at certain scales. Then, if I zoom out until ...
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3answers
570 views

Combine aerial imagery pictures to create a layer

We are looking for software or a web service that we can put in pictures we took using our weather balloon to create a single image, that we can use as a layer for our GIS project. Preferably free, or ...
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2k views

Is there a way to export online ESRI basemap layers to raster?

I have been working on polygonizing the vegetation areas in some counties from imagery. When I have the mosaic raster locally I can easily get the polygons using Image Classification Toolbar. But when ...
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1answer
59 views

Creating a mosaic with gdalwarp - How to deal with no data and overlap

I want to create a mosaic of satellite imagery in .tiff format. I want to create an actual mosaic, not a vrt, because afterwards I will cut the image in to tiles that make sense for my users. Gdal ...
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1answer
1k views

How to adjust online basemap to Arcmap

How can I adjust the online basemap imagery file to our existing ArcMap data. Below are steps I perform to add the basemap data. I Added basemap from "Add Data From GIS Online" in the file menu and ...
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1answer
157 views

How to create NDVI map From LiDAR intensity and RGB image

I am new with GIS and I've been looking for ways on how I could create a NDVI map from LiDAR intensity and RGB image. Is there any way I could do this? I have read that you could create an intensity ...
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1answer
31 views

Satellites to retrieve UV bands

I want to retrieve some satellite images with UV bands,Bun I don't know which satellites are providing UV bands and We can freely download them? I have already downloaded Modis and Landsat images,But ...
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2answers
19 views

How to load two images in ENVI 5.1?

I am using ENVI 5.1 and when I use the Data Manager to load several images and if I want to load two adjacent images, why would one of them load and the other doesn't?. Am I missing something here ?
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Georeferencing aerial photos when only centroid is known using ArcGIS for Desktop or ERDAS Imagine?

I have heaps of aerial photos that need to be georeferenced. I have access to ArcMap and ERDAS. All I am given is an excel sheet with the centroid coordinates of each image. Each photo covers ...
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1answer
29 views

How to avoid the ESRI basemap (Bing imagery) to update?

In my ongoing research, I intend to map transformations. That implies that, based on the ESRI basemap from Bing imagery, I draw certain features (in different layers) as they are today and as they are ...
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10 views

Link feature to import or activate imagery in ArcGIS .mxd

I'm looking for a way to link features to activate or import imagery to an ArcMap 10.2 .mxd. The scenario: I have thousands of individual aerial photo frames and data about each as photo centers, ...
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1answer
38 views

Obtaining free satellite imagery for Australian floods?

How can I obtain free satellite imagery for Australia? I want to find the extend of flood in specific time. I have already tried land-sat.But unfortunately there is no data available for that specific ...
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141 views

Load MrSID file in QGIS 2.2 on Ubuntu 13.10

Is there a way to do this? I have tried a number of the write ups on this, and it appears that libgdal-mrsid-src no longer exists. Is there any other workaround? USDA NAIP imagery is sent as MrSID.
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1answer
328 views

Projection to use with satellite image from Google Maps / Earth

I'm very new to anything concerning GIS so please forgive me if this question has been asked before, but I assure you, I've been trying to find an answer for quite some time now. Of course it is ...
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49 views

Software for image orientation (aerial triangulation)

I'm trying find a software which can orient an UAV Imagery using GCPs (Ground control points in UTM Coordinates system) and Camera calibration (only camera focal length, p1,p2, k0, k1, k2, k3 and ...
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Can I publish mosiac datasets in Arcreader 10.2?

Has anyone had luck with publishing their own imagery into ArcReader 10.2 in a mosaic dataset? I have had success publishing the my own imagery in tiles but not in a mosaic form. Does anyone have any ...
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6k views

How Do You Remove No Data From A Raster (.sid)?

I have an Image.sid that has a white border which is No Data. I've tried using Clip Raster Tool with no success. I've also changed the symbology value for No Data to be transparent. I'd like to ...
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49 views

Hyperspectral Data in ArcGIS Desktop

The public organization I work for has some archived hyperspectral data (.raw - radiance, non georectified). Has anyone processed hyperspectral data for consumption within ArcMap? If so, what sort of ...
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2answers
37 views

Stereoscopy Software

I'm learning the Manual Photogrammetry process, Stereoscopy, to Process UAV Imagery. I'd like to know about others software, especially open source or low cost. ERDAS Imagine, Erdas Extensions for ...
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1answer
1k views

Clipping MrSID files in ArcGIS Desktop?

Does anyone have experience subsetting/clipping a large NAIP imagery file in MrSID format? Some of the NAIP files we have are by county and they have really large file sizes. The files are from the ...
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2answers
382 views

Tasseled Cap Transformation Rapid Eye

I want to do tasseled cap transformation on rapid eye data. the main question would be about the parameters which are used. Somebody has a suggestion?
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1answer
82 views

Is it possible to determine Collection Date of ESRI World Imagery Basemap

It seems like it was possible to do this with Google Imagery if I recall but is there any way to determine the date of collection of the ESRI World Imagery basemap (or other basemaps) at a given ...
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1answer
124 views

how to mosaic rasters in grass gis?

I am new user of GRASS GIS. I need to know how can i mosaic different satellite imageries using GRASS GUI? I was trying to use i.image.mosaic, but could not succeed. I have been looking for online ...
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1answer
27 views

Are there free maps available that can show me land planted with oil palm?

Currently I am taking gps coordinates of oil palm plantations in Africa. I'm putting the waypoints in a GIS program but the free basemap provided isn't always giving high resolution images, making it ...
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Multiple Source Imagery Mosaic Overviews and Display

I have multiple ortho imagery sources that I wish to mosaic into one (fairly) seamless dataset. I have mosaicked each year separately and currently have: one panchromatic (made into an 8 bit ...
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how can i save a satellite raster image as a layer file in arcmap 10.2

I am trying to save a raster satellite image from esri world imagery as a georeferenced layer file. i still want to be able to zoom in and out as i can when veiwing it through the server.
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208 views

How to modify 2 raster images to have the same resolution?

I have data for 2 rasters images that have different resolutions: z downloaded from trmm An MSAVI2 output image. For calculating the correlation between them, the data has to be in the same ...
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1answer
27 views

How to output the number of channels in a .JP2

I am looking for any tool (or python code snippet) that can loop through a file folder of .jp2 images and determine which have 3 bands and which have 4 bands. I am having trouble creating a raster ...
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15 views

Best Way to Display Imagery as Background for Data Collection in the Field?

I'm running ArcPad 10 on a tablet in the field. I need to be able to import hi-res (sub meter) imagery to use as a background in order to help me define polygon boundaries for vegetation classes. So ...
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1answer
189 views

Panchromatic Image association with high spatial resolution

How and Why is a Panchromatic Satellite Image associated with high spatial resolution? I googled and found that it is a single band image, but then why is it called pan-chromatic(All Colors). Does it ...
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4answers
7k views

Spatial resolution of Google Earth Imagery

What is the spatial resolution of imagery used in Google Earth? At various places on the web, I have been reading it varies from place to place - 60 cm, 2.5 m, 15 m and so on. I was wondering if there ...
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2answers
6k views

Where can i download a good World image in GeoTIFF?

I can either be from MERIS (ESA) or from MODIS (Nasa). I already reached these sites: http://www.unearthedoutdoors.net/global_data/true_marble/download ...
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51 views

Residential tree cover for surveying?

Can someone point me in the direction of some high spatial resolution and reasonably recent satellite imagery for central Canada (Manitoba)? I am trying to determine whether I can generate accurate ...
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44 views

USA Historical Satellite Imagery for an Online Application

I am looking for different options to add historical satellite imagery to our online-based application. We currently incorporate Bing Maps into our application, but cannot get historical imagery. I ...
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2answers
85 views

Cropping aerial image using Python?

How can I crop an area from an aerial image knowing the latitude and longitude of the image's corners and also the cropped section? I have a LiDAR scan and I and want to crop an image overlay to fit ...
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1answer
48 views

Easy Guide to ESA satellite data?

Can anybody provide user friendly guidance to ESA datasets? What is available? When will new stuff be available? I struggle to work out what might be interesting amongst the many websites and their ...
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1answer
56 views

Is it possible, and if so how, to effectively classify vegetation types using false near infra red imagery?

Background : I use near infra-red imagery to delineate wetlands and water bodies with good success. It's also obvious to distinguish between new healthy vegetation and older growth and land areas with ...
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1answer
107 views

Rf-Classification seems to work but gives an error 15 seconds later

This is my code. It classifies an imagery-stack(xvars) and reads a shapefile with training-points. If I run single rows they work. Even if I run them all, they work and start to predict but after 15s ...
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43 views

Ortho-rectification of Aerial Image

I took an aerial image of our farm using RC quadcopter. How am I going to orthorectify this image? Please can you help me with detailed instructions/methods involving the process.
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1answer
71 views

Suggestions on Imagery type for ArcGIS for Server (Without Image Extension)

I am exploring the best options to serving raster imagery on ArcGIS for server 10.2.2. As a background, I currently have roughly 200 .jp2 files of about 3mb each. All of these files are currently ...
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1answer
401 views

50cm imagery - aerial or satellite?

The area of interest is 1450 km2. My options are: 50cm newly collected aerial natural color imagery for $28,300 OR 50cm recent archival satellite imagery (includes near IR band) for $20,600 The ...
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3answers
88 views

Colour matching satellite imagery from different time periods

Is it possible to colour match two separate satellite images taken at two different times? I am working with two high resolution, multispectral images that were taken approximately one year apart and ...
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1answer
89 views

Satellite imagery options for small/medium sized countries?

I need to create land cover classifications for a couple countries in central/eastern Asia. The largest country is 50,000km^2 and the smallest is 10,000km^2. What are my options for recent imagery? At ...
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1answer
336 views

Atmospheric Calibration for Landsat 7 ETM+ Gap Filling

This is for thesis work involving mapping of above-ground mangrove forest biomass using Landsat 7 ETM+ imagery. I am assessing correlations between biomass with vegetative indices, e.g. NDVI, and ...
3
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1answer
114 views

Is it possible to highlight water steam sources on Landsat 7 image?

I am trying whether it is possible to view hot steam sources like power plant cooling towers and resulting cloud using satellite images. I was advised to try Landsat (needed free data for initial ...
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0answers
25 views

Creating custom size images from WMS cache

I am currently working on my own WMS service (using PHP). The service works currently if the requested image is in 256x256px size but currently does not support any other size. My service basically ...
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110 views

Counting animals using near infrared imagery from a drone [closed]

I am playing around with an idea of using a near infrared camera to fly transects to count animals on the ground. I have been involved in such work earlier, but on bigger mammals and observer based ...
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Custom imagery not converted correctly in web Bing format tile with Global Mapper?

I have Custom image and I converted to that to the web bing format tiles with the help of global mapper but that are not produce correct quad key in each tile. On the bing map quad key is starte like ...
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49 views

.ecw versus.ers

I have two (seemingly identical) historic Aerial photos of my county of interest. One has a .ecw file extension and one has a .ers extension. I've been using the .ecw without trouble, but wanted to ...
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2answers
179 views

Memory and Processing Efficient Approach to Read a Timeseries in Python

I am trying to store a timeseries of high resolution raster images containing NDVI values into a dictionary for calculations. I am curious as to which approach may the most efficient when loading ...