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 ...
- 8,298
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 ...
- 41.4k
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....
- 131
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 ...
- 10.3k
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 ...
- 1,701
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 ...
- 41.4k
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) ...
- 31
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"...
- 618
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, ...
- 41.4k
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 ...
- 49.9k
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 ...
- 3,593
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 ...
- 4,489
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 ...
- 584
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 ...
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 ...
- 916
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 ...
- 1,701
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 (...
- 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.
- 31
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 ...
- 89
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 ...
- 20.3k
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 ...
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 ...
- 1,928
1
vote
Where can I find the viewing properties on ERDAS?
Viewing Properties are found in the dynamic Vector tab group, as opposed to the static Vector tab in your screenshot.
This dynamic tab group appears when a vector layer is loaded into the viewer and ...
- 3,910
1
vote
Accepted
Exporting many TIFFs issues in ERDAS Imagine 2016?
I am following this up to everyone. This morning on a new refresh day. I went over to the Export tool to export many TIFF. This one is working without any problems. So here is the picture of what I ...
- 4,139
1
vote
Assigning signatures in Erdas Imagine 2016
For the creation of signature files in ERDAS IMAGINE you have to create your training data. You need to pick features (polygons) from your image. For doing that you have to select the AOI (area of ...
- 1,701
1
vote
How to make subset from satellite images without getting empty border?
There is the option to assign a certain value (which you can define e.eg. while exporting data from ArcGIS) as NoData once you start a new project and select the image you want to work on. See User ...
- 11
1
vote
How to assign mean values from different windows sizes to point feature?
If you have the spatial analyst extension, you could use the zonal statistics tool
Set the "Input Raster or feature zone data" to be your polygons (what you have called windows).
Set the "Input ...
- 2,118
1
vote
Analysing Landsat images using ERDAS IMAGINE and ArcGIS
This notation is terrible in communicating application to a time-series. Keep in mind that the subscripts indicate periods of time so, it is the median of all pairwise comparisons. Because the median ...
- 32k
1
vote
Change raster value manually
I can only offer you the tools that I'm familiar with, there may be other ways to do this. If you have the Spatial Analyst extension (ESRI) you should take a look at the "Fill" tool in the Hydrology ...
- 11
1
vote
How to download whole ECW or JPG tiles from web viewer?
Dezoomify
You can use dezoomify to download the full image.
Instructions
Take the original tile URL. In your case:
http://fotogrammi.regione.abruzzo.it/ecwp/ImageX.dll?image?cache=true&...
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