All Questions
89 questions
2
votes
2
answers
3k
views
Using sieve filter in ERDAS Imagine and/or ArcGIS for Desktop?
Where can i use a sieve filter for my supervised classification?
Can i do it in Erdas Imagine or in ArcGIS?
I can't find it anywhere.
4
votes
1
answer
3k
views
Exporting composition as image using PyQGIS
QGIS Print Composer has tool "Save As Image" and I found appropriate function in QGIS source code exportCompositionAsImage. Is it possible to get access to existing Print Composer from ...
8
votes
3
answers
18k
views
Load a raster file directly in Leaflet
Is it possible to load a raster file (e.g. GeoTIFF or Erdas img) directly into a Leaflet map? If so, can you guide me to the correct documentation or method to do this?
I am trying to do this with the ...
5
votes
1
answer
5k
views
Open Source Alternatives to ERDAS IMAGINE ATCOR?
I have been using ERDAS IMAGINE's ATCOR extension for ATmospheric CORrection of ASTER imagery.
What opensource options exist for atmospheric correction of ASTER Level 1B products?
I'm primarily ...
10
votes
4
answers
2k
views
Comparing areas in scanned historical land use maps using QGIS?
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 ...
7
votes
2
answers
3k
views
Creating shapefile of satellite image footprints?
I'm looking for a tool or a workflow to compute satellite image footprints, for a large number of images across directories, and produce a shapefile. Ideal work flow would be:
fire up tool
point to a ...
1
vote
1
answer
373
views
Clipping aerial image pairs by their overlapping area
I have a set of aerial images which I am trying to clip by their overlapping areas, for use in a more involved program I am writing.
Is there a command line based tool out there with an easy method ...
1
vote
2
answers
3k
views
Using Open Google Earth cache file in QGIS?
I have a Google Earth cache file.
Is there any way to open the Google image from a cache file in QGIS 3?
I had done it in standalone PC successfully. Does it works also in Mapped Network Drive also....
9
votes
2
answers
18k
views
image segmentation of RGB image by K means clustering in python
I want to segment RGB images for land cover using k means clustering in such a fashion that the different regions of the image are marked by different colors and if possible boundaries are created ...
7
votes
1
answer
7k
views
How to export the map in very high resolution
I made a map in QGIS.
Now I want to export the resulting image (layers upon layers) for further processing in GDAL.
The print composer only lets me export an image up to a fixed size. If I try to ...
7
votes
3
answers
4k
views
Calculating area of vegetation in raster file?
How do I calculate area of several vegetation types in a raster (.img file type) image. They are color coded. Am using QGIS (1.8.0) and ERDAS 9.2.
7
votes
1
answer
948
views
Automate Exporting of Rasters Using Renderer in ArcGIS
It is possible to export rasters in ArcMap by right clicking the layer-> Data-> Export:
You can then click 'Use Renderer' check box to ensure the image you export uses the current symbology/rendering ...
5
votes
2
answers
12k
views
Replacing Raster Values in Ras1 with Ras2
I have two rasters Ras1 and Ras2.
I want to change the Ras1.
In Ras1, there are few areas, lines, points I am interested having nodata cells and wrong data cells.(limited to interested areas only ...
4
votes
3
answers
7k
views
Adding excel table to QGIS print composer?
Can anyone suggest some ideas to add a excel table to the print composer which will then be exported as a A3 png while retaining resolution. Attempted pasting in word as an enhanced meta file then ...
3
votes
1
answer
3k
views
How to access image CRS transform from ee.Projection object in Earth Engine [duplicate]
I used the following script to export an image from Earth Engine. I am trying to specify the crs_transform parameter argument in the Export.image.toDrive function using the "transform" ...
3
votes
1
answer
4k
views
Removing black box around georeferenced grayscale image in QGIS
I am trying to georeference a grayscale image (*.tif) in QGIS 2.2.0 Valmeria. It is working but QGIS draws a black box around the georeferenced raster image. If i use the option set 0 transparent, not ...
3
votes
1
answer
2k
views
Georeferencing Image using saved Link Table from another Image?
I had a scanned map that I did did a georeferenced a few weeks ago and saved the link table. Now I have two more scanned map that need to do the same thing. It is the same area and one of them I did ...
3
votes
1
answer
2k
views
MOD 35 Cloud Mask HDF in ENVI
I am having difficulty getting ERDAS or ENVI to correctly read and display cloud mask attributes from MOD 35 HDF files. They files are displayed as 0-255, whereas I expected some kind of code 0, 1, ...
2
votes
2
answers
2k
views
NoData Value = 0, problem when creating NDVI, Erdas
I try to create an NDVI from Landsat and ASTER satellite images using Erdas Imagine. In Erdas, the satellite images have a nodata value of 0.
After creating an NDVI, the nodata value is still 0, but ...
1
vote
1
answer
974
views
Black edge (NoData pixels) in Landsat 8 color correction in ERDAS
My boss asked me to mosaic and color-balance multiple Landsat 8 tiles for presentation. I tried to do that in ERDAS but it returned weird result as below:
Obviously it's the black edges or nodata ...
0
votes
1
answer
654
views
Converting tif to format for TIMESAT using BEAM VISAT or ERDAS IMAGINE?
How can I convert tif image into a format for TIMESAT software to create a time series?
I am using BEAM VISAT or ERDAS IMAGINE program.
0
votes
1
answer
14k
views
Earth engine error: Error: Invalid argument: 'image' must be of type Image
I'm trying to export an image for some SST temperatures for a given region ( and imported table EEZ) but I'm getting the error;
Error: Invalid argument: 'image' must be of type Image
Map.addLayer(...
0
votes
1
answer
3k
views
Imagine files between ERDAS and ENVI
I have ENVI 5.0 , ERDAS 2013 SP2, and ArcGIS 10.1 SP1. Every time I save an Imagine file from ENVI 5.0 and open in ERDAS 2013 and it seems like ERDAS does not like it and it would not open and would ...
20
votes
1
answer
36k
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 ...
16
votes
5
answers
33k
views
Finding ways to get free radar (SAR) satellite imagery data sets [closed]
I am looking for finding ways to obtain free (non-commercial use) sources of synthetic aperture radar (SAR) satellite imagery. Does anyone know of sources?
12
votes
2
answers
1k
views
Adding site photos to a print composer atlas in QGIS
This is the first time in over three decades of existence that I cannot find an answer and I actually have to ask one for myself, so please accept my apologies for any formatting issues or lack of ...
10
votes
5
answers
12k
views
How to workaround large mosaic process which is failing?
I need to mosaic about 550Gb of tif imagery together and the software I have tried keeps failing. The area has been split into zones so that the smallest has approx 200 tiles.
I have used the latest ...
10
votes
3
answers
6k
views
Remove clumps of pixels in R
I would like to remove isolated pixels (or clumps of pixels <9) from my raster image.
library(raster)
# create some raster data
r <- raster(ncols=12, nrows=12)
set.seed(0)
r[] <- round(runif(...
8
votes
2
answers
8k
views
Leaflet.geojson webpage performance out of hand, how to convert to .png?
I exported some countries as a single .geojson file. The file includes every country's vertices and coordinates, as that's what a .geojson is ─ a vector file.
Thing is, there are about 20 countries ...
8
votes
2
answers
2k
views
Georeferencing 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 ...
7
votes
2
answers
1k
views
LiDAR intensity image from multiple flight lines?
I'm working with multiple raw las tiles, and I've used Fusion to create an intensity image, but it shows the flight line overlap (see below). Any idea how can I smooth the image so that the overlap is ...
7
votes
5
answers
3k
views
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 ...
7
votes
1
answer
7k
views
Creating scatterplot with icons (svg or png) instead of points?
I'm just starting with R and I wanted to know if it's possible to create a scatterplot with custom icons (svg or png) instead of points.
I started to import a shapefile, and then I have a set of ...
6
votes
1
answer
6k
views
Creating a mask with transparent pixels in Python
I have a GeoTIFF image with pixel intensities ranging between certain values. Let's say between -2 and 2 (the image is normalized). I have a certain threshold which interests me, let's sat 1. I would ...
5
votes
2
answers
223
views
View more than three pictures in the image viewer of QGIS
I'm adding photos inside point fields in a GeoPackage table in QGIS. The default image viewer cannot show more than three photos and the window is not scrollable.
Is there any settings so that I can ...
5
votes
3
answers
10k
views
Create kmz with coordinates from images and thumbnails for symbols
I have about 110 geotagged images and am looking for an effective way to create a .kmz which contains for each image a point based on its geotag and uses a thumbnail of the picture as symbol. Clicking ...
5
votes
1
answer
961
views
Importing XMP Metadata into attributes fields in QGIS
I would like to import EXIF & metadatas of JPG images into QGIS.
For each image, a vector were created by 'ImportPhotos' pluggin, it adds some EXIF into attributes fields but some importants EXIF ...
5
votes
1
answer
2k
views
Mosaicking images with different CRS using rasterio
I am doing mosaicing of 14 raster images (.img format) to completely cover a province.see original spatial location of separately opened tiles(). Mosiac operation is completed but 4 tiles are mosiaced ...
5
votes
4
answers
11k
views
Determining which "color" each image band represents?
I have a satellite image that has a few bands in it. But I don't know what colors they are supposed to represent, nor do I know where to look for this information--the file's metadata say nothing ...
4
votes
1
answer
2k
views
When adding properties to an image, no longer allowed to add to Map
If I create an image, that I add properties to, I can no longer add the image to the Map. How can I add it, or how can I add properties so that it doesn't break?
var myPoint = ee.Geometry.Point([-64....
4
votes
2
answers
16k
views
Image collection to Single Image in Google Earth Engine
I'm stuck with an issue in google earth engine.
I'm working with MODIS Burned Area Monthly Global 500m, for a certain polygon area:
var MOD = ee.ImageCollection('MODIS/006/MCD64A1');
var MOD1 = MOD....
4
votes
3
answers
3k
views
Matching colours in already mosaiced single image? [closed]
I have an already mosaiced image for a large area. I need to match colours in this single image. I do not have each image separately. I just have this large single image downloaded from GLS. How can I ...
4
votes
1
answer
3k
views
1m cell size equivalent value in decimal degree
I'm doing re-sampling pixel size in ERDAS 2014,I'm using input image(Indian terrain) in GCS_WGS_84 projection.
Now I have to keep out put cell size as 1m,what is the 1m equvivalent value in Decimal ...
4
votes
2
answers
8k
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 adivices ...
4
votes
2
answers
4k
views
Saving MapServer output to 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:
http://...
4
votes
1
answer
906
views
Seeking GIS tool to automatically extract polygon geometries from images
Let's say I have multiple png images like the following one:
I'd like to find a way where I can automatically draw polygon geometries on this image. Something like the following:
My expectation is ...
4
votes
1
answer
2k
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
1
answer
207
views
Export atlas PDF failed to print images item on template
I create a template on QGIS which contains some text and images. I render the image using HTML with code:
<style>
.cropped {
position: absolute;
width: 27mm; /* width of container */
...
3
votes
1
answer
4k
views
Exporting map error from QGIS
Whenever I try to export a map as an PNG image I get the 'successfully export' message but there is no file generated. The error happened in Zanzibar so I changed to Noosa but I still can't export the ...
3
votes
2
answers
942
views
Convert image from one EPSG defined CRS to another
I've got a lot of image files (.png or .jpg) that I want to convert from one EPSG defined CRS system to another, e.g. from EPSG:31255 to EPSG:25833, on a server within a Java app.
For each image I ...