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

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70 views

Counting number of plants in area using images from UAV?

How do I count the number of pineapple plants in a 1-hectare block? I have heard of these algorithms but I don't know how to do it. I'm still a newbie of QGIS, ArcGIS and ENVI. I have the NIR, RGB, ...
4
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61 views

How to use GDAL Correlator?

I need to align several images using FOSS. There is Correlator tool in GDAL (source) that seems to be suitable for the job. But I was unable to find documentation for it or a tutorial. Can someone ...
3
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56 views

Python script to automate saving satellite images for different combinations of lat longs

PS. : This is my first try at a GIS application. Please forgive if my question is pedantic. I would like to get a series of satellite images all at the same scale centered around different points on ...
3
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31 views

Why does my Validation Script continue to run when adding the result to the map?

I am in the process of developing a python script that creates a list available imagery for our project areas that would then allow the user to choose which imagery source they would like to add to a ...
3
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592 views

Novel ways of filling in missing values in a raster

I am looking for robust ways to fill in missing values in some rasters. They all have a single layer. Missing values consist of single pixels to medium sized patches. Rasters are around 1000 x 1000 ...
3
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115 views

Is there a tutorial explaining the basics of WMS?

I'm building some software that needs to download satellite map images to display behind some survey charts. I understand that, to download these images, I need access to a Web Map Service. The only ...
3
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93 views

Are there any naming conventions for aerial imagery?

Do GIS projects involving high resolution NAIP quarter quad imagery typically use the USGSID code and qq (e.g. 3910232ne) or the GNIS code and qq (e.g. 39102e1ne) to organize data? I can't seem to ...
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38 views

How to interpolate values for NaN pixels using ENVI?

I'm currently using MODIS data and am running into problems with NaN values in the final product caused by clouds. I'm interesting in a simple way to spatially interpolate (fill in) these NaN values. ...
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204 views

Good GPS navigation app for iPhone with downloadable OFFLINE maps?

I am looking for a good GPS navigation app for my iPhone that will work away from wifi and cell coverage (GPS only) and thus allow me to download offline maps. Paid app is OK. Must Have features: ...
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88 views

How to serve an image layer with tilestache

I have some .png images with associated .wld and .tfw files. I'd like to display this in OpenLayers, and I already have a Tilestache server running, so it would be good to leverage this. OpenLayers ...
2
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40 views

Why did my footprints build failed?

As I am trying to add raster to my mosaic dataset and were able to see them and now all of my raster are not showing. Why did it could not build a footprints ? I have tried everthing to get them ...
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139 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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882 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 ...
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44 views

Old imagery WMTS

I am looking for a web imagery tile service that provides old imagery, in the same vein as Google Earth's old imagery, but one that could be integrated into an OpenLayer or Leaflet map. Any idea ? ...
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27 views

Loss of Quality in UAV Imagery after building pyramids in ArcMap?

I am using arcgis 10.1 to plot and print maps with a background with UAV imagery. When I insert an image (Tiff format), it loses quality. The program prompts me to create pyramids, once this is ...
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57 views

TIF not showing UTM coordinates in world file

I have a lot of tif files (ortho imagery that came with Lidar data). Each tile has a .tif and .tfw but the world files (.tfw) have line 5 and 6 as numbers that aren't what I would expect as I was ...
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75 views

Saving a TIFF file with band names

Does anyone know if it's possible to add a TIFFTAG when saving a tiff file (I'm using the C/libtiff interface) that will give a name to each band? Some kind of per-band TIFFTAG_IMAGEDESCRIPTION is ...
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61 views

How to align hundreds of rasters quickly

I'm hoping to accurately align hundreds of aerial images that are slightly off-kilter. The images cover the same area on different dates (several acres). They contain identifiable features around ...
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50 views

How do I use Multispec for Landsat data?

It seems that I only can use the Clustering if I want to cluster only one band data.. If I open up more than 1 band (in one image), the cluster toolbar is disabled? optional: Is there any free ...
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64 views

ArcGIS Server Image Service from Mosaic Layer

I have successfully created an image service from a mosaic dataset using NAIP imagery. I would like to create another image service that displays the same area in NIR (4,3,2). I have created a mosaic ...
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176 views

Stacking Band ratio on Landsat 8?

I have a question about Landsat 8 I am going to work on... I am thinking about stacking all the bands however there are 15 m, 30m, and 100m Do you stack all together ? This is to give the end-user ...
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43 views

Satellite data between 1975-1985 in Brazil?

So I've been looking for satellite imagery to use for a project without any luck. I need images between 1975 and 1985 near the Roosevelt river in Brazil, from any satellite at any spatial/spectral ...
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352 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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26 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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90 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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38 views

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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90 views

Looking for gis server for pictometry that can do bing-like “birds eye” tilted view and rotation

I need an open source gis server that can present these pictometry images, I guess they are also called 2.5D. The camera on a plane takes 5 shots, one orthogonal, other 4 in all directions. North, ...
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132 views

ESRI Basemaps - World Imagery: Is it possible to bring certain imagery into foreground (change the viewing order)?

I have a basemap loaded in a map in which there are 4 overlapping images. I would like to either turn off 3 of the 4 images or bring the one i want (marked with X n the screen capture) into the ...
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76 views

How to perform image classification with SemiAutomaticClassificationPlugin and BIP files?

I have multiband satellite images BIP format, Landsat TM/ETM containing 7/8 bands respectively along with a separate header file, some of them corrected by nearest neighbour classifier. I'm working ...
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222 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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376 views

ESRI imagery service that is WMS Compliant

I want to use the ESRI free online imagery service http://services.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer But I want a service that is WMS compliant. Is there a version of ...
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327 views

Raster satellite images for QGIS

When I try to apply a downloaded GIS satellite (t=rimage to Quantum, it doesn't seem to open properly. There must be a step-by step description on how this would be done effectively. Can anyone tell ...
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261 views

Assign Custom Band Combination To Image Catalogs In ArcGIS

I have an image catalog composed of 4 band rasters. I would like to use the same image catalog, and set custom renderers for a true color and false color combination and save each of those catalogs ...
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14 views

Provider of hyperspectral imagery SWIR band

I'm looking for aerial hyperspectral imaging with SWIR band; size of ground pixel should not exceed 5m and dated not earlier as 2015. Could you propose provider such of data ? Area of interest is ...
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7 views

Mosaic georef is a few pixels off for half of my image, how to georeference?

I have two sat. images from the same platform on two different dates. The images overlap each other nicely, but I cant get them to accurately mosaic into one raster image. I merged the two photos ...
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11 views

How to avoid the quilt effect when displaying imagery from multiple source

In the context of creating my own imagery viewer (for educational purpose), I would like to learn about the process used to create seamless transitions between satellite imagery tiles coming from ...
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42 views

Digitizing scale when digitizing from Bing imagery service in QGIS

I need to digitize a bunch of islands from imagery in QGIS. It is the Bing Maps aerial imagery layer. I will obtain all required permissions. My plan is to lock the map scale at 1:25,000 and use heads ...
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33 views

Georeferencing two images at the same time in QGIS

Has anyone ever tried to georeference two images at the same time on QGIS? In my application I don't atually care much about the positioning itself, but in the scale and orientation. Why? I have ...
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17 views

Loading 4 band imagery in QGIS

I am loading 4 band imagery into QGIS 2.8.1 for Windows and am having a visual issue. The image looks blown out (see attached), which made me suspect that this was an issue with the 4th (alpha) band. ...
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48 views

High Resolution Imagery in the public domain

Needed a online high resolution imagery for USA free to be used anyone for personal and commercial* purposes. RGB 2012-2015 Whole country coverage 0,5-2 meters per pixel WMS or TMS Any ...
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32 views

0.5m resolution up-to-date images for Iraq

I use TerraServer for general keeping up to date on infrastructure projects. TS, however, don't exactly offer the latest images - some are 12 months old, some even older. A small saving grace is that ...
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21 views

google maps engine connector

I am trying to use google imagery in QGIS through the Google maps engine connector plugin. I relatively new to QGIS and need some help. What I want to do i use the google maps in QGIS and then print ...
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26 views

image files and metadata

When writing metadata for .img files stored on disk, as opposed to a raster catalog, raster field names are shortened to 10 characters, because the vat.dbf file is created and read (by arc catalog ...
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31 views

I am looking for Thermal IR Photography with 1 m resolution?

I am looking for thermal IR photography with 1m resolution? It needs to be recent or maybe a company in western Canada that can fly a mission like this. Satellite or flown photos both work, I am just ...
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42 views

remove black margin of georeferenced image before overlay to google maps

i used envi to georeference satellite imagery. then I tried to overlay that geo image to google map. all fines BUT the black margin appears on the map. is there any way to git rid of that black ...
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41 views

Band values after TOA reflectance calibration of WV-2 exceed 1

I use custom python-GDAL script to calibrate WV-2 scenes to TOA reflectance accordingly to 'Radiometric_Use_of_WorldView-2_Imagery'. Here you are a histogram example with the pixel values of the ...
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199 views

read tiff to bmp in c# got only white image

i want to convert a tif image to bmp i was following tutorial in https://trac.osgeo.org/gdal/wiki/GdalOgrCsharpRaster but i dont get an image i want to see the code is : // Creating a Bitmap to ...
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51 views

White box problem

As I am trying to work on getting this problem done , I am using Mosaic Dataset for the whole state of New Mexico using our NAIP ...now the problem is that I could not get rid of the white "box". I ...
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28 views

Night - lights for social welfare

I want to to find the social welfare and the population density for Europe and Africa with night-lights. Is there any site where I can find images with good resolution (I only think VIIRS)??? I have ...
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28 views

Old World View Map / Tiles

I m currently looking for Imagery of Old World View Map, maybe 19th century, black white is okay. And if there is tiles services that would be cool. Is there any site that still contains those ...