Questions tagged [image]

A representation or description of a scene, typically produced by an optical or electronic device, such as a camera or a scanning radiometer.

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GeoServer problem on WMS call when the image changes

We started to work with GeoServer a few months ago. We encountered a problem that we cannot answer, linked to the interaction with GeoServer and SLD service plugin. As follows a simplified ...
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Adding list to Image Properties using Google Earth Engine JavaScript API

I am trying to iterate through an image collection and add a property to each image that is taken from a list. For example I want image 1 in the collection to have the property list item 1. I first ...
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1 answer
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Earth Engine: how to access the dates from a list retrieved from an image collection

I have implemented the answer of Noel Gorelick to the question: Earth Engine get dates from imageCollection It is the following code: var dates = s1_collection_f .map(function(image) { ...
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missing data in the obatined map of CH4 concentration over India using Sentinel-5P dataset

I obtained the image given below for the CH4 concentration over India from June to August (Spring season) of 2019, 2020, and 2021 respectively. Unlike the images I got for other seasons, the data ...
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1 answer
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Google Earth Engine finds Sentinel-3 images with no intersect with defined ROI

When I search for Sentinel-3 images that have been captured over a small lake, GEE returns images with no intersect with defined ROI. This behavior is just observed when searching for images captured ...
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QField problem with QGIS WebDA archiviation

I'm having trouble viewing photos uploaded to a public server and viewable via URL. if I upload the URL in the attached field I can view the image on QGIS (3.22). Once the project has been imported ...
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Converting each image in image collection to separate bands with band names in Google Earth Engine

How do I create a stacked image from an image collection of Sentinel 1 images over a period? I am selecting only the ascending mode, and the VH polarization. If I use ".toBands()" at the end ...
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GeoServer returns blank image (completely transparent)

I have a recent issue occur where for certain styles GeoServer is returning blank, completely transparent images. See here for an example. GeoServer version is 2.17.2 This is occurring with GetMap ...
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Exporting MODIS AOD monthly(mean) composite for 5 years

I am writing a code in Google Earth Engine, in which I want to export the image composite of mean monthly MODIS AOD for 5 years. I am writing the following code, but whenever I try to run it the ...
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Use of ratio in ImageWMS in OpenLayers

I am trying to understand the setting of ratio in ol.source.ImageWMS but I am not succeeding. I already understand the ratio: 1, as there is not much to understand there. ratio: 1 = browser viewbox. I ...
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Combining GEE layers to create a global categorical raster with class values?

I've been making a climate map of the world and each climate zone is stored in a different variable (i.e. warmtemperatedry, cooltemperatemoist, cooltemperatedry as you can see in the picture). I'd ...
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How to set image size, resolution and extent for pixel based images comparison

I have to do a comparison between a DEM file and a high resolution image (aerial image) to detect some area in a high resolution image. For this comparison I have to change pixel size, extent and row ...
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1 answer
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Downloading all images in an ImageCollection to my local computer from Google Earth Engine

Based on Filter Sentinel-3 data based on cloud cover over a region of interest, I managed to get an ImageColection containing the name of hundreds of Sentinel-3 images with specific cloud cover over a ...
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4 answers
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How do I adjust a layout's zoom level before exportToPNG?

I'm using ArcGIS Pro, and ArcPy. I have a file geodatabase with 1,000 unique polygons. What I would like to do is export each feature as a PNG image. I'm expecting to have 1,000 image files when it's ...
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1 answer
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Mapped function's arguments cannot be used in client-side operations

I am trying the below code to perform spectral dilation in GEE but gives me an error: spectral dilation: Layer error: A mapped function's arguments cannot be used in client-side operations The code ...
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4 votes
1 answer
216 views

Get rid of no-data part of raster in Python

I have a raster that, for the most part, contains no-data values. Only on the right side there is data: I would like to get rid of the left part and have a new raster. The extent of the new raster ...
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Applying Linear Stretch Landsat 8 SR Using Google Earth Engine

I'm doing research indices of impervious surface, but for calculate the indices, the Surface Reflectance value of Landsat 8 should be converted to a value in the range 0 - 65535 in order to maintain ...
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3 votes
1 answer
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<geotools/HeatmapProcess> convert GridCoverage2d to BufferedImage

I got the heatmapprocessTest code from geotools github However, I can't confirm that the heat map is coming out well. Ultimately I want to create and save the heatmap as a BufferedImage. (png) For ...
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1 answer
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Extracting metadata from Google Earth

How do I extract metadata from Google Earth? I downloaded the satellite image from Google Earth Pro. The data I want to know is that the date, resolution, and the server from which the image was taken ...
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Seeking workaround for adding image from ArcGIS Online organizational content to Dashboard layout without sharing it publicly

Is there a workaround for adding an image from ArcGIS Online organizational content to a Dashboard as an embedded element without sharing it publicly? The url for an image within organizational ...
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1 vote
1 answer
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Use ostu to count water, but export image is all black

When I run my code, it can be print image in map. But when I export to the Drive, it becomes all black image. Like this: There is my code, it will be a few long. Most part of them is OSTU code which ...
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33 views

Using Landsat MSS Collection 1

When I use Landsat MSS Collection 1 dataset in my roi, I can't get any images from Tier1, but Tier2 I can. This is code from someone to count the number of image, each year. When I switch to Tier2 ...
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Getting Rid of Black Boundaries from Tiff Image using Google Earth Engine

I'm getting a tiff image from earth engine using the code below, but the image I get is rectangular and surrounded by a black box. How can I get rid of the black boundaries on the corners and get a ...
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1 answer
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Generating feature collection from image band statistics

I'm trying to calculate the percent forest cover for 125 basins using the MapBiomas 30m land cover product for Brazil. The data is provided as an image with band values for each year. When I try to ...
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1 vote
1 answer
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How do you check the attribute information of the tif image in QGIS?

Where can I check the brightness value (DN) of the image stored as 'tif format' in QGIS? What is the way to add it to the attribute table? Current progress: Coordinates are assigned to each pixel of ...
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Is the position coordinate of a pixel the center coordinate of that pixel?

Is the position coordinate of a pixel the center coordinate of that pixel? For example, in an image composed of 4 pixels as shown in the figure below, the coordinate values of 150 and 150 are put in ...
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  • 447
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1 answer
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Brush up satellite image coloring

I have received the following satellite image. Unfortunately, the color grading is really poor and makes working with this image very tedious (see screenshot below). I am rather new to QGIS. How can ...
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I want to make sure that the two images match in the ENVI program

Is there a function that can compare pixels and brightness values of two satellite images in the ENVI program? I want to make sure that the two images match numerically or histogram. There are two ...
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  • 447
2 votes
1 answer
112 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 */ ...
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2 votes
1 answer
99 views

GetMap Request WMS

I formulate a GetFeatureInfo request that returns the feature information of the centre point of the map. The GetFeatureInfo request for WMS is: http://geoservices-inspire.irisnet.be/geoserver/...
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Get image width and height in Google Earth Engine

We can get image dimensions with get("dimensions") ).get(0). The image is from ImageCollection,for example: However, There is no dimensions here. The image is computing results, there is ...
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170 views

Plotting images from Google Earth Engine?

I am trying to plot GEE images as standalone figures (e.g., JPEG or PNG) for publications, however, I have not been able to find a standard method for doing that. For example, I have a landcover image ...
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5 votes
1 answer
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Noisy lines in all scenes for Landsat 7?

I'm seeing patterned lines in all Landsat 7 images that clearly are image artifacts. There are lines that jet in from the edges (the center looks better) Does anyone know what it is and if there are ...
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Exporting grouped item as image using ArcGIS Pro

I have imported an image and added text surrounding this image into a layout through ArcGIS Pro. I intend on using this as a logo for other maps produced by my team. How do I export this grouped item ...
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1 answer
203 views

QGIS Export to KML with image file

I have a layer in QGIS, points, 3 columns of data and a 4th is an image. When I export to .kml (client request) it loads fine in Google Earth and shows all the points, but when I click on a point I ...
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535 views

How to read and plot multiple TIFF files in Colaboratory?

I'm new in python and I would like to know how I can read and plot MULTIPLE TIFF files in Colaboratory with (maybe) a for loop. Here is what I did for a single TIFF image: from google.colab import ...
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3 votes
2 answers
113 views

Calculate an equation from two collection image

I've got stuck when I'm trying to calculate MNDISI with MODIS. FYI, to calculate MNDISI, that should use LST collection image and SR collection image, so I'm trying to combine MODIS Surface ...
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1 vote
2 answers
184 views

Earth engine error: Number (Error) Image.subtract, argument 'image1': Invalid type. Expected type: Image<unknown bands>. Actual type: ImageCollection

I have some problem with my script, I'm trying to calculate MNDISI, and I've got some issues with errors: Number (Error) Image.subtract, argument 'image1': Invalid type. Expected type: Image. Actual ...
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1 vote
0 answers
30 views

QGIS Problem with displaying web-based images by Action attribute

I have the .csv file, which includes the direct URLs to the images in the columns. Unfortunately, I can't open them at some point. Following this video: https://www.youtube.com/watch?v=nKxbOOsWwvk&...
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When creating the QFIELD package, a message indicating that the ID could not be found was displayed [duplicate]

The image map of heaven and earth is loaded normally in desktop QGIS,When creating the QFIELD package, a message indicating that the ID could not be found was displayed. Can't pack. How can I solve it?...
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32 views

Error in exporting image in GEE [duplicate]

I am trying to export an image from Google Earth Engine to my drive and I have gotten this error message: Error: Image.setDefaultProjection, argument 'image': Invalid type. Expected type: Image. ...
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53 views

Only one image is showing up on OpenLayers map

I can only get one of the following DEM_image PNGs to show up on my map. Its always the first one "DSS.layer.DEM.image0" that shows up, the rest do not render. I can see in the console ...
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46 views

Symbol recognition on a scanned image (map)

I have a specific task and I'm looking for possible approaches. What I'm trying to do is this: I have a high resolution (600dpi) scanned, and georeferenced image of a map, and I need to be able to ...
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4 votes
1 answer
362 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 ...
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-1 votes
1 answer
334 views

How to export selected bands from an image using GDAL [closed]

I have a multi-band GeoTIFF (with 8 bands), and I want to extract first 3 band and 7th band from that image and export them as TIFF image using GDAL. Bands details given by dataset is shown in ...
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1 vote
1 answer
67 views

Difference between mosaicking two images and blending two images

Let's say I have two 1-band images image1 and image2. Is there a difference between ee.ImageCollection([image1, image2]).mosaic() and image1.blend(image2)
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1 vote
1 answer
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Creating images by calculating other images

I have some categorical images (Y, T, Max, Min, MaxUp, MaxLo). Each image has integer values in different ranges. I want to create an image MinUp that MinUp = T when Max = MaxUp ...
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2 votes
1 answer
285 views

Overlaying image with polygon shapefile in QGIS

I am using QGIS and I'd like to know how I can make this kind of image overlay using as base a polygon shapefile of my city's blocks, just like in the following images.
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1 vote
1 answer
74 views

Feature-linked image in Report layout (QGIS)

In QGIS 3.16. This is related to this question and this question for which the only posted answers do not solve my problem. I am creating a report with a field group section; the goal is to have 1 ...
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1 vote
0 answers
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Filter collection of images with selected geometry

I am developing an application to analyze the images of the districts of a region. I select the districts this way and it works fine (see image) var selectd = ui.Select ({ items: Object.keys (...
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