4 votes

Does QGIS have a functionality similar to Flicker in Erdas Imagine?

I ended up creating a script to do this. This asks which layer to toggle on/off, then the number of seconds to flicker and adds a pause button to the top left. Hope it helps. from qgis.core import ...
GeorgeC's user avatar
  • 8,228
3 votes

Knowing the pixel size for a raster before it was resampled

Upsample the image to the suspected resolution and Downsample it to the original. If the resulting and original are the same (or close enough), it is very likely that you have a lower resolution image....
Ernesto Iglesias's user avatar
3 votes

Load a raster file directly in Leaflet

Web browsers have support for a limited list of image formats. They all support JPEG and PNG formats, and there's growing support for WebP. Up to this date, no web browser supports TIFF images. Do ...
IvanSanchez's user avatar
  • 10.2k
3 votes

what is the basic programming language or code language for raster swipe tool?

In OpenLayers Swipe Control is easy enough to use, the following code should set you up: var map; var swipe; function init() { map = new OpenLayers.Map({ div : "map", ...
Hasan Mustafa's user avatar
3 votes

Classified image color in Erdas Imagine

The first thing I will do if I want to open a raster image in Erdas Imagine to export the (.tif) image into (.img) because the latter is an Erdas Imagine format. There is a white paper on how to ...
ahmadhanb's user avatar
  • 40.9k
3 votes
Accepted

Smooth mosaicking of smaller orthomosaics to form a homogenous mosaic

That is noise / offset pixels or unexpected dark or light strips fringing an object. Data from airborne multispectral or hyperspectral imaging scanners shows a pronounced striping pattern due to ...
Maxima's user avatar
  • 1,701
2 votes

ERDAS file not recognized as ERDAS Hierarchal File Architecture (EFHA)?

Here is the fix: 1) Import your image and convert it to an .img If this does not fix the problem then try the following: 2) Click on the "manage data" tab, and click on edit image metadata 3) ...
Alex's user avatar
  • 31
2 votes

ERDAS Imagine ecw compression settings

ECW V3 version (since the 2015 version at least) preserves the 16-bitness too, you used V2 and it is more compatible but cannot preserve it. Raster --> Radiometric --> LUT Stretch is how to do that 16 ...
Arto Vuorela's user avatar
2 votes

Unstack band layers from raster

I know this an old question, but here is another way to unstack multiband-image. The solution is done using QGIS with Orfeo toolbox installed. You can use split image tool from Orfeo toolbox. The ...
ahmadhanb's user avatar
  • 40.9k
2 votes

Activating swipe tool in ERDAS imagine?

I am not sure if you saw the following file, but since you did not provide any screen shot or further explanation, the pdf file on how to use the ERDAS IMAGINE Swipe tool may help you to figure out ...
ahmadhanb's user avatar
  • 40.9k
2 votes

Layer stacking Sentinel 2 imagery

Layer stacking is a process for combining multiple images into a single image. In order to do that the images should have the same extent (number of rows and number of columns), which means you will ...
ahmadhanb's user avatar
  • 40.9k
2 votes

Doing supervised classification for images on ERDAS?

If you already have this training areas in shapefile you can convert them to AOI's: Open the shapefile that you want to use as training area Create a new AOI file Use the "Select by box" tool and ...
Carolina Tello's user avatar
2 votes
Accepted

How to keep the georeferencing data from ArcGIS when importing rasters into Erdas imagine?

I made it work by converting it to IMG file format and loading it to Imagine. When I got the error ""Spheroid name not found based on the given datum name", I right cliked the raster, access "Metadata"...
alecsx's user avatar
  • 618
2 votes

Mask raster cells within only

This rule cannot be applied by default, but the workaround is to use negative buffer. if your mask is a raster, you can shrink you mask by one pixel with the shrink tool. if your mask is a feature ...
radouxju's user avatar
  • 49.7k
2 votes

Mask raster cells within only

The extract by mask tool that you used gave you the correct result based on the raster resolution of your image. The cell size or raster resolution of the image is coarse compared to the mask polygon, ...
ahmadhanb's user avatar
  • 40.9k
2 votes

How to assign mean values from different windows sizes to point feature?

Do you use model builder? It takes a few steps but you could buffer your points and rasterize them and use this raster as input as zones for zonal statistics as table. Then this table can be joined to ...
PythonStudent's user avatar
2 votes

How to assign mean values from different windows sizes to point feature?

Why not use the "extract values to points" tool (Spatial Analyst) as step one. That will give you the elevation value on each point. Then use a 3x3 fishnet and perform a spatial join with the point ...
jbchurchill's user avatar
  • 4,489
2 votes

Exporting Sentinel-2A imagery from QGIS to ERDAS Imagine 2013

It all comes down to histogram stretching options you use in QGIS and ERDAS. First, you should check your stretching in QGIS: Right click your layer > Properties > Style and check if Stretch ...
Basile's user avatar
  • 3,543
2 votes

Define vector projection and reproject shapefile in ERDAS IMAGINE 2013?

I also experienced similar problem. To solve this problem, I followed the following steps. i. ArcGIS>ArcToolbox>Data management tools>Projection and transformation ii. From Projection and ...
Sushanta Gupta's user avatar
2 votes

Convert ERDAS Imagine AOI to Shapefile

There might be an easier workflow, but this worked for me: Open AOI (that you wish to convert to a shapefile) in 2D View (table of contents) Create new shapefile (File > New > Vector Layer) Choose ...
ENIAC-6's user avatar
  • 896
2 votes
Accepted

How to work on histograms in ERDAS Imagine?

Be sure to have the Home tab selected in the ribbon and click on the i icon on the Metadata button.The Image Metadata dialog box will be displayed.Information is displayed for a default data layer (...
Maxima's user avatar
  • 1,701
2 votes

Histograms in Erdas Imagine staying grey

You first need to create the stack of your tiff files after that you will have a single image with all the individual spectral Layers registered and stacked into it. The set of tools in Image Metadata ...
Maxima's user avatar
  • 1,701
2 votes
Accepted

Masking an image in Erdas using Thematic Image, the mask comes out looking wrong and completely different than input image

I finally figured it out, it was just the image statistics. I needed to ignore 0's when computing image stats and it came out fine.
K.Sanders's user avatar
2 votes

Most efficient way to perform rastercalculations with GeoTIFF and/or ErdasImagine files greater than 100gb

I had a similar problem some time ago, but inside a C++ program that already linked with GDAL. What worked good enough (probably not the best) was a thread reading, a thread computing, and a thread ...
Javier's user avatar
  • 79
2 votes

Most efficient way to perform rastercalculations with GeoTIFF and/or ErdasImagine files greater than 100gb

This is more a general IT issue than a GIS one. If you think of computing as a triangle with legs CPU, RAM, and Disk, where the area enclosed by the lines is computing power, you've configured your ...
Vince's user avatar
  • 20.1k
2 votes

Most efficient way to perform rastercalculations with GeoTIFF and/or ErdasImagine files greater than 100gb

While ive not worked with Rasters quite as Large as you are suggesting, I have had some success with very large Rasters in GDAL using the following. First thing I would reccomend, if your not ...
Richard McDonnell's user avatar
2 votes

Most efficient way to perform rastercalculations with GeoTIFF and/or ErdasImagine files greater than 100gb

Here give this a shot. It uses the block read capability in rasterio to read in a large amount of data before doing the band math and writing the result, which will take advantage of your large amount ...
Shawn's user avatar
  • 1,817
1 vote

GDAL, Python, pyramids/statistics read/write

I have figured out and gotten to work one part of my statistics issue. src_ds = gdal.Open(outfile) outBand.SetMetadataItem("LAYER_TYPE", "thematic") outBand.SetMetadataItem("STATISTICS", "YES") This ...
als's user avatar
  • 92
1 vote

single feature probability in ERDAS object-oriented classification

As far as I know, SFP is the class probability derived from a Bayesian Network, i.e. a statistical supervised classifier that can incorporate both continuous and discrete information. There is a hint ...
radouxju's user avatar
  • 49.7k
1 vote

Knowing the pixel size for a raster before it was resampled

In addition to the response, I wanted to provide a tool that can be used to achieve this seeing that you are using ArcMap. Resample-Data Management Toolset Change the spatial resolution of your ...
whyzar's user avatar
  • 12.1k

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