All Questions
874 questions
1
vote
2
answers
20
views
How to deal with IMG, LBL and HDR files?
I found these image files here: (https://planetarydata.jpl.nasa.gov/img/data/m3/CH1M3_0001/DATA/20081118_20090214/200811/L0/)
These files are LBL, HDR and IMG files. How does one view and work with ...
- 123
1
vote
0
answers
27
views
Overlay GPS fix data over JPEG Image
I want overlay GPS Fix data in the form of NMEA data on an image I have.
I could use Google Earth but the GPS Fix data are close, therefore I want a zoomed in image showing the fixes.
Going an ...
0
votes
0
answers
17
views
Converting Image to Gridded Feature Collection in Google Earth Engine
I'm working with Dynamic World data in GEE over a region of Bangladesh.
var roi= ee.FeatureCollection("users/salem043/Bangladesh/CB_with_added_upazila");
var lulc = ee.ImageCollection(&...
- 405
1
vote
0
answers
35
views
Opening .img file created in Erdas Imagine 2023 in Erdas Imagine 2022
I am having an issue working with a file created in Erdas Imagine 2023 in Erdas Imagine 2022. I ran a tool with the output .img. However, the .img format seems to be different in Erdas 2023 vs Erdas ...
- 11
2
votes
1
answer
73
views
Setting extent for screenshot via PyQGIS
I am trying to figure out how I can set the extent of the rendered image because with QgsMapSettings().setExtent it doesn't work for me.
How can I set the extent as big as the biggest active vector ...
- 21
1
vote
0
answers
17
views
Bulk export images of single vector overlaid on series of rasters in QGIS
I am using QGIS 3.34.6.
I have 54 clipped raster files (monthly satellite pasture observations) with a vector file (farm outline) overlaid. Raster layers follow yyyymm naming convention.
In order to ...
- 19
0
votes
0
answers
12
views
Add image layer to ecognition
Why, when I add an image layer to ecognition are the objects missing?
I have a ecognition project and I did multiresolution segmentation.
Now I want to add another image layer to project and clarify ...
- 1
1
vote
1
answer
105
views
Google Earth Engine script for cropping land use Image collection to shp and producing csv aggregate output
I'm new to Google Earth Engine.
I'm using ee.ImageCollection("GOOGLE/DYNAMICWORLD/V1") to look at land use types (specifically tree cover - band 1) within a specific shp file area.
I want to ...
- 11
0
votes
2
answers
66
views
Cannot display images on QGIS as action [closed]
I've been following through the QGIS training manual, section 5.4.
I've created three features on the map, and have associated images with these features as attributes.
I have set up an action in the ...
- 11
1
vote
1
answer
111
views
How to create an action to show an image from local files in QGIS 3.36.3 in Windows 11?
I've been trying to follow the tutorial laid out for QGIS 3.34. (https://docs.qgis.org/3.34/en/docs/training_manual/create_vector_data/actions.html#follow-along-creating-an-action), but apparently the ...
- 15
0
votes
0
answers
8
views
How to filter out single properties from an Image on GEE?
I'm trying to filter out a single property from this Image on GEE but cannot figure out how to do so. I'm trying to extract "5: Coral/Algae" from "benthic_class_names" to create a ...
1
vote
0
answers
54
views
Saving QgsSymbol as image with specific DPI using PyQGIS [closed]
I want to save QgsMarkerSymbol as a high dpi image (png) invoking the asImage method and then save its result (QImage) in a local directory. I tried using a custom QgsRenderContext object like in the ...
- 73
0
votes
0
answers
20
views
Getting black parts of the exported image using Export.toDrive
I am trying to export images from an image collection, the exported image is black with no values appearing in arcgis pro
Here is my code:
polygon = ee.Geometry.Polygon([xMin, yMin, xMax, yMin, xMin, ...
- 1
0
votes
0
answers
35
views
Error in display the image by cartopy
I want to visualize the image using cartopy.
The image shows OK in the geemap.
The coding as follow:
import ee
import geemap
import cartopy.crs as ccrs
import the cartoee functionality from geemap
...
0
votes
0
answers
26
views
Image fails to dispalyed in QGIS Popup window
I can view the image path from attribute table but I can't view the image in popup. I can see the image using the identify feature option in toolbar. But I need to display the image in popup as a user ...
2
votes
1
answer
343
views
Simple way to put a canvas on a map using Leaflet?
In Mapbox GL JS I might do something like:
const canvas = document.createElement("canvas");
canvas.width = WIDTH;
canvas.height = HEIGHT;
map.addSource('canvas-source', {
...
- 151
0
votes
0
answers
47
views
Matching satellite, DEM and OSM images
I have a set of satellite GeoTIFF images (from https://xview2.org/) that I want to pair with DEM images from OpenTopography (https://portal.opentopography.org/raster?opentopoID=OTNED.012021.4269.3) ...
- 1
0
votes
0
answers
44
views
Use images as symbology for point features
I have a vector file that contains points having a name attribute that matches the name of traffic sign images I have stored locally. What I'm trying to do is to assign to each point its corresponding ...
- 25
0
votes
0
answers
50
views
QGIS 3D Map View : how to set image resolution on export
QGIS 3.36.1 on MacOS 13.6.6
From a 3D geopkg layer (LOD2) in a 3D map view I would like to export an image with higher resolution. Actually the exported image seems to have only 72 ppi. Is there a ...
- 71
1
vote
0
answers
116
views
GeoServer, CSS Styling, SVG parameters
I have a working SLD 1.1. on GeoServer 2.24.1
Part of SLD calls a parametric SVG image (green fill (#335b239) and red stroke(#ff0000)):
<!--Parametric SVG-->
<se:ExternalGraphic>
<se:...
- 39
0
votes
0
answers
42
views
Create an array of band names where the pixel value is 1 in Google Earth Engine
I have an image in GEE with 20 bands, each corresponding to one year. Indeed, I have a time series. Each band can have values 1, 0, or -1. Value 1 means a specific event starts, and value -1 means the ...
- 303
0
votes
0
answers
95
views
Aligning features of two raster images without "skewing" either using QGIS
What is the best way to simply move one raster image, without skewing it, to align with another?
Does this require georeferencing?
I don't want to "tweak" either image. Just to move / shift ...
- 1
0
votes
0
answers
46
views
What data does clustering use from multiple raster files?
I currently have a series of rasters of the same area across different times. The data is categorical: the product of a supervised classification used on LANDSAT data run on ERDAS Imagine. Each ...
- 23
3
votes
1
answer
85
views
Setting image as font filling in QGIS
Is it possible to use an image as a label font filling to have a result like in the following examples with national flags?
- 185
0
votes
2
answers
326
views
Marker icon images not displaying in Leaflet.StyleEditor
While using Leaftlet.StyleEditor plugin, I cannot change the marker icon as the available icon images are not displayed. I tried the Demo(https://dwilhelm89.github.io/Leaflet.StyleEditor/) from the ...
- 29
1
vote
1
answer
97
views
Change select color in a raster in QGIS using Serval or Value tool
Is it possible to edit the table view of a raster that you see in the Value tool?
Alternatively
Using Serval, once we have a selection polygon can we choose a specific range of raster values within ...
- 8,298
2
votes
1
answer
108
views
Does QGIS have a functionality similar to Flicker in Erdas Imagine?
I am trying to replace an Erdas Imagine workflow with QGIS and I have got most of it working but can't find a solution for fliker. We have it set to turn an image on and off every few seconds to ...
- 8,298
0
votes
0
answers
34
views
Erdas - Export LUT Instead Of Real Values
I am using Erdas 2022.
I have NDVI index of an imaging, and after creating it, the view shows a LUT which is not the original pixels, which is essentially the automatic stretching of the program.
I ...
- 101
1
vote
0
answers
50
views
Sentinel 3 data changes in Google Earth Engine platform since 2021
For calculating Cl-a in lake waters, I'm using three bands of Sentinel-3; one of them is band 10 (Oa10_radiance). Since 2021, the values of this band and band #1 contain nonsense, very low negative ...
- 11
0
votes
0
answers
61
views
Reprojected image is rotated, can't match it with DEM
Why would reprojected sat image be rotated? I can't match it with source DEM map, if there is rotation.
gdalwarp -t_srs EPSG:31287 input_satmap.tif output_reprojected.tif
I use that line in gdal. ...
- 119
0
votes
0
answers
49
views
Replacing raster values by list GEE
I have a raster that I have mapped his values. I have made a new list of values that I want to replace them. But I want the replacement to be by pixel to pixel.
Example:
original raster pixels value = ...
- 1
0
votes
0
answers
46
views
Excluding 'No Data' Pixels When Counting number of pixels in an AOI with ERDAS IMAGINE
I'm working with Landsat imagery in ERDAS IMAGINE 2014 and have encountered an issue with 'no data' pixels within my Area of Interest (AOI). The AOI includes unwanted 'no data' pixels that are ...
1
vote
0
answers
35
views
Improve image quality of "Decoration"
I imported a key using Decorations -> Image in QGIS 3.32 and the quality is poor, especially if the image is made smaller. I do not mean that the actual image file is small, but that displaying the ...
- 51
3
votes
1
answer
153
views
Image Resolution degrading when georeferencing
I have a scan of a historical map in pdf. I converted it in to png as well as tif and then georeferenced it. However, as soon as I load the image (both png and tif) in to the georeferencing tool the ...
- 253
0
votes
0
answers
72
views
What does the metadata tell you about an image and its sensor?
I'm using a software called ERDAS and my tutor says that the Metadata can be used to detect which sensor your image came from. Is there anything you can tell me that links the metadata to the sensor?
...
0
votes
0
answers
22
views
Merging Subswaths with ERDAS Imagine
Does anyone have experience with merging subswaths of a SLC Sentinel 1 image in ERDAS Imagine? I cannot find the right function for it.
1
vote
1
answer
122
views
Band calculations using satellite images captured on different dates
I want to do some band calculations using bands taken from multi spectral (MS) satellite images and bands from a short-wave infrared (SWIR) image. I have one SWIR image covering the whole area of ...
- 101
1
vote
1
answer
77
views
QGIS map composer remove red cross with condition
In the atlas composer, I'd like to be able to assess whether the path to the image is valid.
Something like, but I always have the "photo" attribute (an ID) filled in. I will check the path.
...
- 558
0
votes
1
answer
467
views
ArcGIS Pro map series exporting to JPEG or PNG using arcpy script tool has same extent for every exported image
I've written an arcpy script tool to automate exporting a map series to a set of image files (one image file for each page of the map series).
Each image has the correct features displayed, for those ...
- 8,436
0
votes
1
answer
421
views
In GEE replace NoData value with value Zero in an image with only one band
I have the following code in GEE: I am trying to replace the NoData values with Zeros.
var mag_nbr = float_predictor_variables.select(['MAG_NBR'])
var mag_nbrZero = mag_nbr.where({
test: ...
- 303
0
votes
1
answer
66
views
Does Landsat satellite image should have raster value to -1 and 1?
I am calculating the NDVI for Landsat-8 using the formula as shown below:-
But the pixel value rendered is as shown below: -
But the NDVI values need to be between -1 and +1 however, the value ...
- 83
-1
votes
1
answer
338
views
Displaying image with absolute path written in layer for QGIS Map Tips [duplicate]
I am trying to display the images of a layer with the "map tip" function.
The absolute path of each picture (D:\ ... \ ...\...jpg) is written in a field called "path".
I tried to ...
- 71
0
votes
0
answers
102
views
QGIS: Export ShapeFile-Layer with image coordinates
I am completely new to QGIS and I am trying to solve this issue:
I have 3 layers: OpenStreetMap, an image and my shapefile layer with polygons.
All polygons are within the image.
Is it somehow ...
1
vote
1
answer
46
views
Working with 8-bit image in Earth Engine
I'm working with the MODIS Terra Continuous Fields 250m product. The data include several bands, including a "Quality" band.
var geometry = ee.FeatureCollection("FAO/GAUL/2015/level0&...
- 315
0
votes
1
answer
216
views
How can I use code to get accurate "crs_transform" of ee.Images after the clip() operation?
I use GEE(Google Earth Engine) for my research. I found that the parameters "crs_transform" of the ee.Image did not change before and after the clip() operation.
print(ee.Image('LANDSAT/LC08/...
0
votes
1
answer
185
views
QGIS python for generating TIFF images from LAT/LON
I am new to PyQGIS, looking for help with the following. I included some pseudo-code at the bottom.
Read a CSV file with records having these fields: Longitude1, Latitude1, Longitude2, Latitude2, ...
- 1
0
votes
0
answers
138
views
Round numbers of Image Collection in Google Earth Engine
I have an image collection filtered data
How can I compute sum reducer with two decimal places of my total image.
var imagess = chirps
.filter(ee.Filter.date('2022-02-01', '2022-02-10'));
print(...
- 327
0
votes
0
answers
210
views
Exporting Images using PyQGIS
I am attempting to export an image based on a portion of the map.
I have written code that successfully identifies the area of the map I would like to output, but I am having trouble exporting ...
- 1
1
vote
2
answers
489
views
How to mask bands of an image based on values of one of the bands using numpy and gdal
I have a raster with two bands, and I want to mask both bands to get data where band "yod" has a value of 2011 and export a new tif file with the same two bands masked.
The following script ...
- 303
0
votes
1
answer
370
views
For loop over Feature Collection to return Image Collection in EE python API
I am new to the EE python API and am struggling to get a for loop (could eventually also use a map function) over a feature collection. My idea is to have one image and a FeatureCollection as input, ...