Questions tagged [overlay]

A spatial operation in which two or more maps or layers registered to a common coordinate system are superimposed, either digitally or on a transparent material, for the purpose of showing the relationships between features that occupy the same geographic space.

Filter by
Sorted by
Tagged with
0
votes
2answers
5k views

Calculating proportional data for polygon by taking attributes from other polygon

I have a features class which has polygons in it. I also have a Block group level data for demographic variables like population. Now when I overlay the polygon on the block group level data to find ...
0
votes
1answer
18 views

Google / Mapbox static maps displaying custom image with certain bounds

I have a process which generates a simple Google Static Map (can also be a MapBox static image as the code is pretty much interchangeable). It's recycled code from a project I found years ago. The ...
1
vote
1answer
48 views

Split lines by polygons PostGIS

I have lines that I would like to split at polygon boundaries. The line table is MULTI and the polygon table is MULTI and was derived from a MULTILINESTRING table that was buffered then unioned to ...
1
vote
2answers
82 views

Performing identity operation in PostGIS?

I would like to perform spatial identity operation (ArcGIS example here) using PostGIS. I have two polygon tables, one of which is the input layer and the other table is the overlay layer. The output ...
1
vote
1answer
28 views

Leaflet side by side plugin is not working with imageOverlay

I'm trying to use the side by side plugin. I already check in the issues and change the getContainter() with getPane() in the .js file. this._divider.style.left = dividerX + 'px' this.fire('...
2
votes
2answers
241 views

Averaging overlapping rasters with gdal

I am working on creating a class which will merge several georeferenced rasters into one using different strategies, essentially taking average, max, min where the images are overlapping. So far I've ...
0
votes
2answers
46 views

GeoPandas sjoin with extensive quantities

I have one geodataframe that contains polygons and corresponding land use category (e.g. agricultural, commercial, retail, residential, ...) and another that contains census tract polygons and ...
0
votes
1answer
19 views

Translating one raster's contents closer to another’s with each at different scales using QGIS?

I'm working with multiple raster images, each in the Albers Equal Area Conic projection: one of the mainland US, one of Alaska, and one of Hawaii. I'd like to translate the Hawaii layer to be closer ...
0
votes
0answers
13 views

Subtracting features from one layer using another layer in ArcGIS Desktop? [duplicate]

I have 2 layers of land parcels for a particular area (shown on top of each other like so): The darker parcel lines and road polygons are from an earlier parcel map. The land has been developed and ...
1
vote
2answers
1k views

Identity tool not working as expected?

I have two shapefiles. Shapefile A has five attributes and shapefile B has 20 attributes. I use the Identity tool to determine, what of shapefile A lies in shapefile B. This is how both attribute ...
1
vote
0answers
27 views

Set-overlay collection of polygons on itself [closed]

I have a GeodataFrame in Geopandas, that consists of a number of polygons, each overlapping its neighbors. What I want is to generate every single possible polygon from all the intersections, so that ...
-1
votes
2answers
62 views

Finding overlay/intersect shape percentages using QGIS? [duplicate]

I am working on a project in which it's necessary for me to overlay 2 layers (a map of precincts and a map of census tracts). I need to be able to determine the %area of each census tract covered by ...
0
votes
0answers
21 views

How to select SpatialPoints inside the SpatialPolygons

I have two documents. One is a csv file which contains lon and lat information. Another is a shapefile. I want use "over" command in r to select points inside the polygons, but I get all NA results. ...
1
vote
2answers
46 views

Adding information to polygons inside polygon from other polygon in QGIS?

I have two layers in QGIS. The first one contains buildings and the second one contains blocks. Now I want to add the ID of the block to all buildings inside this block. Are there any functions in ...
2
votes
2answers
132 views

OpenLayers overlay bubbling problem

Regarding on the previous question asked https://gis.stackexchange.com/a/303372/119333, solution from best answer is implemented and its working. I am rendering tab panel inside popup overlay and you ...
0
votes
1answer
402 views

Overlaying a .png image that comes with a world file in UTM with OpenStreetMap data?

I have received a geocoded .png image (2380 x 2396 pixels) that comes with a world file containing georeferencing information in UTM format: worldFileParams = [0.5,0.0,0.0,-0.5,690920.0,5335407.5] ...
0
votes
0answers
23 views

Coordinate system problem; two features won't match up (linear units problem?) [duplicate]

I have two features that should overlay, both are shape files and one is polygons and one is polyline. The line should essentially outline a specific region in the polygons, but they are completely ...
1
vote
3answers
2k views

“Identity” overlay in QGIS?

I have two polygon layers I'd like to overlay using QGIS or another open source tool. What I want as output is a polygon layer with the extent of one polygon, but with each polygon in that layer ...
1
vote
1answer
122 views

Overlaying satellite image tileLayer over OpenStreetMap in LeafletJS?

I am currently creating a web app for visualizing disaster impact via satellite imagery. I have satellite images (.tif) which I need to overlay over OpenStreetMap. Since .tif file is very large, I ...
1
vote
0answers
31 views

Imported CSV point data layer invisible over the raster map layer, though each layer shows good separately “zoom to content” [closed]

I am trying to import CSV file (comma delimited text) and get no reported errors but there are no points data visible overlays over raster data map 1. QGIS 3.6 2. the point data layer over raster ...
2
votes
1answer
43 views

KML file with multiple ground overlays

I have geolocated imagery which I would like to plot in Google Earth. I have the 4 corner points of each image, and I am currently laying the images down using GroundOverlay and gx:LatLonQuad. My ...
1
vote
0answers
36 views

QGIS: habitat suitability/combining raster layers

I have created a number of raster layers for different environmental factors (slope, roads, rivers, forest cover) and want to combine them to find areas where the 'ideal' aspects all overlap. For ...
0
votes
0answers
19 views

Clip OR Overlay in ArcGIS output feature empty

I use the Clip and Overlay to deal with download data. But they do not work and result in failure. Maybe the data is too large for ArcGIS Desktop to calculate. I do not know where I can check whether ...
5
votes
1answer
139 views

How to assign (or project) CRS to LiDAR file in lidR?

Can someone enlighten me if there is a difference between initializing a CRS object using the EPSG code versus just the +proj string read from a shapefile? Consider the following objects: A ...
0
votes
1answer
65 views

Enlarging/shrinking while maintaining aspect ratio when using Google Earth Pro to Edit Image Overlay?

In Google Earth Pro "Edit Image Overlay", the only way I have found to enlarge or shrink the overlay while maintaining the X:Y aspect ratio is to grab one of the four green corners (not the four ...
0
votes
1answer
20 views

Rotating around arbitrary point, not center when using Google Earth Pro to Edit Image Overlay?

In Google Earth Pro "Edit Image Overlay", we can rotate the overlay around its center (via grabbing the green diamond,) but how might one rotate it around an arbitrary point not its center? (Yes, ...
1
vote
1answer
551 views

Moving QGIS basemap by hand in order to achieve overlaying with point layer?

I am an environmental engineer and the aim of my QGIS 2.0 project is to visualize the results of a sewage water system inspection. In a first step I included the hoppers from a csv file and added a ...
0
votes
1answer
94 views

Selecting features of layer present just in one feature of another layer?

I'm a student approaching to QGIS 2.0.1-Dufour. My goal is to know how many features of a layer are present just in one feature of another layer. I tried both with the tools "spatial query" and "...
0
votes
0answers
35 views

Leaflet image overlays and iOS 12: partial rendering

My PWA (using Leaflet 1.5.1) is currently running (since 2 years) on Android and iOS without problems, until iOS 12 was released. From that point on I have very weird issues on iPhone and iPad. Main ...
1
vote
0answers
232 views

Setting bounds for image overlay in Leaflet

I'm using LeafletJS map. I need to use an image overlay. I have done it like so: onMapReady(event: any) { this.layers.push(imageOverlay(this.imgSrc + "map.png", [[35.334847, 25.328072], [35.337847,...
0
votes
1answer
32 views

Image Overlay 3D Adapt in Google Earth

When adding an image overlay (specifically a GeoTiff exported from QGIS), the image looks great until you turn on 3D buildings or terrain. These features pop through the image overlay, and disrupt the ...
1
vote
1answer
61 views

Getting Canada shapefile to overlay model on QGIS?

How can I get Canada to overlap with the rest of my map? I think this is a CRS problem but I really do not know how to solve it.
0
votes
0answers
67 views

Creating a Leaflet Overlay from JSON

I am trying to make an interactive map using leaflet where the user can toggle an overlay of multi-polygons. So far the following code works using a checkbox to display dummy point data, and radio ...
1
vote
1answer
19 views

How can I get common points of different point shapefiles in ArcGIS? [closed]

I have different data sets (point shapefile) and how can I get common point points of these shapefile in ArcGIS?
2
votes
2answers
71 views

Raster Calculation with 2 Raster Layers [closed]

I am attempting to create a new raster layer based on the values of one raster layer using a formula that is conditional based on the values in another layer. Two source layers: > ndvi class ...
0
votes
1answer
50 views

CAD data not overlaying in ArcGIS, but has correct coordinates in AutoCAD

I received a set of drawings that were drawn in millimetres but in the correct coordinate system; I use GDA94 with my coordinates in metres, so this should theoretically be a simple fix using my usual ...
2
votes
1answer
73 views

Question regarding area overlap

I'm using land use data, and report the proportion of each sub-catchment that is used for “Grazing Modified Pastures” and “Irrigated Modified Pastures”. I'm essentially focused on these two layers, I ...
1
vote
0answers
78 views

PyQGIS overlaying raster image on vector map correctly?

I have some code written in Python using PyQGIS where I am trying to overlay a raster image gridded with coordinates on to a vector shapefile map with the same coordinates. However, when overlaying ...
1
vote
1answer
81 views

Ordered weighted averaging error QGIS

I am trying to use Ordered weighted averaging to sum up values across different raster overlays in QGIS 3.4.4, but I get this error: Traceback (most recent call last): File "C:/PROGRA~1/QGIS3~1.4/...
-1
votes
1answer
29 views

Determining map overlay diagram origin?

I am trying to determine the origin of the popular map overlay diagram that shows a GIS as a stack of map layers connected by four vertical lines representing the geo referencing system. Can someone ...
0
votes
1answer
2k views

Performing weighted sum overlay analysis in QGIS?

I have weighted raster data converted from polygons with different categories. I have ArcGIS with 3D Analyst extension, unfortunately do not have Spatial Analyst, and I would like to use QGIS to ...
1
vote
0answers
30 views

Using Interactive Overlay to Export Geographic Coordinates

I can barely spell JavaScript, but I have envisioned an application working with or embedded in Google Earth that employs the following work flow: This application is intended on working at scales of ...
0
votes
1answer
138 views

GeoPandas Overlay Symmetric Difference: How to get the upper polygon

I have the following code which get the difference of a pie wedges. c= gp.overlay(a,b,how='symmetric_difference') How to get the upper polygon?
0
votes
1answer
3k views

OpenLayers 5 add multiple markers

I'm using OpenLayers 5 to show a map and add markers to it. I can see the map without any problems but only the last marker is shown. I saw an answer about using .clone() method on the marker that's ...
0
votes
0answers
18 views

Raster Weighted Overlay Terminology

In a Arcmap raster weighted overlay, if an input data set is designated as "restricted" will overlay calculations not be performed on the "restricted" areas, and those areas will be included in the ...
2
votes
1answer
534 views

Burning shapefile geometry to raster in PNG format with gdal_rasterize?

I was trying to overlay a shapefile to some raster images from a directory using gdal_rasterize. But then encountered this error: ERROR 6: The PNG driver does not support update access to existing ...
0
votes
0answers
10 views

gdal2tiles.py output tiles changed on new install. geodetic image overlay shifted

given a global coverage image at .04 deg from 60N to 60S and -180 to 180 I previously generated tiles for google overlay using gdal2tiles.py once I determined the right syntax/args to use. The image ...
0
votes
1answer
153 views

Counting number of polygons within polygons using R?

I have two huge shapefiles. One contains polygons of one kind of vegetation and the other one representing a grid. A situation as follows but, of course, much bigger: I need: the efficient way to ...
5
votes
2answers
1k views

Calculating edge length of polygon within overlapping polygon using ArcGIS Desktop?

I have a layer of wetland polygons and a layer of lakes. I basically want to find the total length of lake shoreline contained within each wetland and add these values as an attribute of the wetlands. ...
0
votes
2answers
142 views

Reclassify a raster in R based on two rasters with the output containing over 1000 bands

I am trying to convert the outputs of a model into a raster based on both a temperature raster and a seasonality raster. I have over 2100 bands so ifelse statements aren't going to cut it. An example ...