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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2answers
132 views

What does 4.5 mm resolution mean?

this is a rather simple and trivial question, but before I contact my supervisor I want to get sure. I have a .tif image that says the resolution is 4.5 x 4.5 mm. The output of gdalinfo is: Pixel Size ...
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0answers
72 views

Processing drone Images of body of water?

I took some pictures of a body of a body of water using a multi-spectral sensor attached to drone. When trying to process the image using Pix4D, more than 50% of pictures were unable to calibrated. ...
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0answers
125 views

Reducing image collection separately for each image to make series?

I know how to reduce a collection to one image, or an image to a value in Google Earth Engine. But I can not find an easy way to reduce each image in a collection to a statistics and get a list of ...
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2answers
89 views

Detect the coordinate reference system based on an image

Given a map as image, how can I find out which coordinate reference system it has? The question is general, but here is a specific example. Below is the map for which I want to find the coordinate ...
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1answer
1k views

How to download satellite image from planet.com using API key

I would like to know what to do (step by step in simple words) and how to get data from www.planet.com There is tutorial https://www.planet.com/docs/api-quickstart-examples/ but anyways I have ...
3
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1answer
208 views

ArcMap Image Analysis Window - functionality is grayed out

In ArcMap's Image Analysis Window, none of the tools are available even though I have a raster selected in the window. I do not have Editor turned on. I can't identify why the Processing tools are ...
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2answers
1k views

Linking images to features in geojson layer popup using Leaflet?

I have a map of cycle fatalities, in which skull icons are clicked to produce custom popups: I would like to include an image along with the rest of the information on the popup, so there's a picture ...
2
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1answer
110 views

Seeking Image similarity software?

Could anyone suggest a script/tool/software, that would: recognize and quantify the similarity/dissimilarity between the four attached images? Meaning, it would show that there is a greater ...
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1answer
163 views

Invalid or nonexistent map configuration token

I get the return message NON-VALID PICTURE URL in the POPUP in the CARTO map. when editing in CARTO I get the "Invalid or nonexistent map configuration token". Please forgive my ignorance as I am a ...
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0answers
323 views

Select border region from segmented image

I have several thousand aerial photographs which have been scanned in and orthorectified, but the image borders and fiducial markers remain on the image. I am looking to identify these parts of the ...
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0answers
49 views

Locating and copying millions of images in QGIS?

I have image data collected across the US and Canada from 2016 and 2017. I need to find all images that are within 5 meters of each other in order to compare changes in landscape over the year. Eg, ...
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0answers
16 views

View Images in Carto

For 120 datasets, which I already loaded into carto and are shown where they are supposed to be shown, I want images to be viewed as well. In my thinking it should have been enough to put in an URL ...
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1answer
76 views

QGIS project with integrated images

I would like to know if anyone knows how to incorporate images as attributes in a QGIS project, and that these are displayed even if the folder containing the project and the source files (shapes, ...
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1answer
520 views

Cloud cover percentage in Google Earth Engine

I'm doing a project at my university about the Cloud cover percentage in determinate areas in the world. I'm completely new to Google Earth Engine and I'm struggling a lot trying to find a solution ...
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1answer
436 views

Exporting map as georeferenced image

I am using OpenLayers to create a map where I can Zoom and export the view (Following this exemple https://openlayers.org/en/latest/examples/export-map.html) This works fine, but what I need is a ...
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0answers
38 views

adding photo to the pop up field in qgis2web? [duplicate]

I want to add charts on my web map in a way that when i click on the point the chart appears in the pop up field. Do i have to add it as an image in the attribute? Can i do that when the ...
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1answer
96 views

Get convex hulls for all rasters in raster_columns [closed]

how to search the polygons of the images that I have in the Database? I want execute this function ST_AsText(ST_ConvexHull(rast)) for every "r_table_name" SELECT r_table_name FROM ...
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0answers
51 views

Couldn't load images on html on plugin processing (Linux and Windows)

Context I develop a processing plugin for QGSI 2.18 and in design GUI with *.ui files (Qt4) I can’t load PNG images with relative path in html defined in .ui files Works with absolute path It ...
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0answers
295 views

Leaflet.js - GeoJson properties as icon [closed]

In this map I am looking to display each image as a thumbnail from the GeoJson file. For the moment I am using this code: var myIcon = L.icon({ iconUrl: '<img src="feature.properties....
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2answers
64 views

Raster image changes colour after import

after raster .tiff image import in project, it changes colour. Imported Original What could be the options in QGIS 2.18.16 to get back to original colours? This kind of problem is quite new, ...
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1answer
249 views

Using QGIS to turn a PNG into ASCII

I am trying to take three grayscale PNGs and turn them into an ASCII file for a CNC machine to mill them out. To get an idea of my project, here are some links: This guide is the basic premise of ...
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2answers
515 views

An image on top of the marker with Leaflet

How can I achieve the same result (image below) with Leaflet? L.imageOverlay() only can supply one image, and the image size is based on (lat, lon). But what I need is the image size the same as the ...
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0answers
57 views

Identifying clusters in classified imagery data

I am relatively new to working with satellite imagery at 1 m resolution and am struggling with a methodology for "grouping" the imagery. Using ArcGIS, I have performed an ISO classification on some ...
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0answers
225 views

Different image quality for different zoom levels (OpenLayers/GeoServer)?

Original data that raster layers are made of are of a high quality. At a small scale (1:100) this is useful. However at a large scale (1:10 000) it results in ~300KB PNG images which are actually not ...
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0answers
459 views

Assessing accuracy of image classification using ArcGIS Desktop? [closed]

I have classified images in ArcGIS Desktop with the support vector machine classifier, and am now struggling with the accuracy assessment. I have only been able to find tutorials on how to do it ...
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1answer
1k views

Fast way to get all points as integer of a LineString in shapely?

So I have a shapely LineString: print np.round(shapely_intersecting_lines.coords).astype(np.int) >>> array([[ 1520, -1140], [ 1412, -973]]) I want to get all the points in ...
3
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1answer
658 views

How to georeference an image dynamically

I am looking for dynamic approach how to georeference an image of a radar. This is a data that is going to be fetch every hour. Of course I will only need radar data (without base layer and borders) ...
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1answer
288 views

How to make subset from satellite images without getting empty border?

I have Landsat 5-8 images, and after creating subset for the area of interest there is an empty border on the image as black part. How to remove it or how to create subset without it? Here is the view ...
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0answers
105 views

Combine raster (monocromatic and RGB image)

I have to make an image starting from a cadastal map (monocromatical image) and an orthophoto (RGB image). Both are in tif format. The images are perfectly coincident, resampled to have the same pixel ...
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1answer
159 views

Distorted image of KML in QGIS

I just started using QGIS and I used Google Earth to export images as KML ground overlays. I then bring the KML into QGIS, then georeference the raster. I tried using de CRS 6370. However, the image ...
2
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0answers
149 views

Adding non georeferenced image as BaseLayer

I am trying to add non georeferenced image as a Base layer in OpenLayers3 (v.3.8.2). On top of that there is WMS, called from GeoServer, as Overlay. I successfully loaded both layers, but they are not ...
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1answer
66 views

Can legends be exported as image in CARTO BUILDER?

How to add a legend when exporting a BUILDER map as jpg/png image?
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1answer
1k views

Adjust image size in popup to fit inside popup container

I would like to display images in popups. It works but the problem is the images are too large: I've added a class in the img tag in my js-file: var picURL2 = 'http://www.lib.utexas.edu/maps/...
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1answer
406 views

How can I display a GeoTIFF with multiple bands on OpenLayers?

I have a NetCDF file including 1365 bands (when opening in QGIS for example). To display it on an online map like OpenLayers, I tried to export it as a GeoTIFF image. I read a solution here that ...
2
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1answer
296 views

Sentinal-2 Georeferenceing [closed]

Are Sentinel-2 data geometrically corrected or do they need to be georeferenced as an image to image? What is the best software for processing?
6
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2answers
2k views

Detecting overlapping blobs in image?

I have read the following two posts related to my question; however, my problem is slightly different and I'm having a hard time solving it. Finding if two polygons Intersect in python? Getting ...
2
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1answer
3k views

Loading a shapefile and image using DotSpatial

I am using DotSpatial 1.7 in my win form app. I have an image (original image) downloaded from Universal Map Downloder and then loaded this file with a shapefile in QGIS and then georeferencing the ...
2
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2answers
877 views

Summing of individual image's statistic over ImageCollection Google Earth Engine

I have an ImageCollection containing FIRMS fire image in 2014. I want to count number of fires in the year for a predefined region. I can find a way to count number of fires for individual image ...
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1answer
331 views

how to convert this satellite image to RGB image

I have a TIFF file, looks like this: **Driver: GTiff/GeoTIFF Files: quickbird2015.tif quickbird2015.tif.aux.xml Size is 15106, 5106 Coordinate System is: GEOGCS["unknown", DATUM["unknown", ...
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1answer
82 views

Atlas - Export one image for each street of multiple areas

I have 2 layers: OSM roads polyline layer various area polygon layer I need to export each area with every road highlighted. Here are 2 exemples of export of the same area with 2 differents roads: ...
3
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1answer
100 views

Down sample with imagemagick then import worldfile?

I'm trying to get a better understanding of the limitations of world files and how I can use them in a current project. If I produce an ESRI world file (tfw) with listgeo: listgeo -tfw clip.tif ...
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1answer
71 views

Options for generalizing raster?

I have a DTM raster which has too high a spatial resolution for my intended use, and I need it more generalized. Can't put my finger on how much more, but considerably more. My first thought was to ...
2
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1answer
89 views

Getting ArcGIS online web map to update images coming from randomly generated link?

I am creating a web map that shows images from a live traffic feed. The feed, which is coming from the Texas Department of Transportation's website, updates every few minutes. When the updates happen ...
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0answers
42 views

Google Earth data backup [closed]

Is it possible to have data backup? If so how long? Except Google Earth is there any other authentic system that can provide cultivations image data of a field for last few years?
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1answer
326 views

How can I identify least cloudy image in Google Earth engine?

I need to Load Landsat 8 TOA images, get the least cloudy 2015 image. Search engine shows several images. How can I identify least cloudy image?
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1answer
450 views

How to apply compression (e.g. LZW) when exporting a map from QGIS composer to TIF?

QGIS > Composer > Export as image > *.TIF I need to apply lossless compression (e.g. LZW or ZIP), when exporting a map from QGIS (v2.18) composer to TIF image. This settings are missing in the export ...
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0answers
69 views

Automated way to create polygons from coloured map

I have a scanned map that has areas of different colours. I want to create polygons for each area and would like to avoid doing it manually (tracing over the shapes). Is there a way to do this? I ...
1
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1answer
43 views

Restrict geoprocessing from ArcGIS Server service

I have an Image Service up on our ArcGIS server. Its a DEM we are providing it to some of our partners. Works great and fast, but I want to turn off the ability to run tools from the service within ...
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1answer
188 views

Why is GDAL isn't supporting .raw images?

I tried to open a .raw image (Raw image format) using GDALOpen() with GDAL C API. So, I wrote the following code to test it : in_data = GDALOpen("/home/YOYo/workspace/NY/Data/fig.raw",GA_ReadOnly); ...
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1answer
215 views

ReadAsArray() equivalent in C

I'm new with GDAL ... and I'm trying to write some code where I have to read a .raw image and store it as an array of 32-bit floats. It seems that it is easy with python, I just have to use: array = ...