Questions tagged [layers]

A layer is a collection of information. It contains specific elements of a gis in a specific presentation method (e.g raster or vector layer). Layers can be edited separately in order to create individual toppics for a map.

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1answer
123 views

Arcpy apply symbology from layer

I have some substances TPH, CO2, SO2, VOC, analyzed in a period of time 2001 - 2017. In the .mxd each year is a group layer, containing all the substances for that year: 2001: - TPH - CO2 ...
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1answer
147 views

Resizing Layer Panel in QGIS

How do I make the Layer and Layers Order boxes of a usable size in QGIS. They come up as very small boxes. All other panels appear to work OK I use a Mac running High Sierra
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2answers
259 views

How to extract Z data from a shapefile from points on another separate layer QGIS

I have two layers; one with elevation data (m), and the other with roads (derived from points via points to polyines). I want to run a spatial query that basically extracts the elevation data from the ...
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1answer
43 views

Why can't I change my layer properties?

I know that the shapefiles seen in figure 1 contain data taken from a database on the internet which is constantly changing. However whenever I try change its properties such as its symbology, seen ...
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1answer
49 views

With which version of ArcGIS (Desktop and Server) does MrSID Generation 4 (MG4™) work?

I haven't really been able to find anything on LizardTech's site with those details or the difference between Generations but not compatibility with GIS systems. Reference links - Esri Supported ...
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0answers
208 views

Deleting layers in QGIS?

I am having issues with my layers. I am using QGIS v3.2, and have been stuck on this issue for a while now. I using OGA License blocks to plot certain points at sea. These license blocks follow a ...
2
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1answer
330 views

How to edit geometry of multiple layers simultaneously in QGIS 3?

I have several line layers (route, pipes, cables) that share the same geometry and would like to edit them simultaneously. Is there a way to easily snap the geometry of the pipes and cables layers ...
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0answers
25 views

Unable to view previously published AGOL Map Image Layer

It's been a while since I've worked with AGOl and map image layers. I'm in the process of republishing several Map Image Layers to a new server. The issue I've been having involves not being able to ...
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2answers
378 views

How to zoom to a specific loaded layer

I'm trying to zoom to a layer that was loaded with a script, just like manually would be done by right clicking the layer and pressing the "Zoom to Layer" button. I've tried several ways and the ...
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2answers
46 views

Layers missing at project start-up

Does anyone know what is the problem?
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2answers
107 views

Assigning numbers to grid of polygons using ArcPy?

I would like to number the shown grid of polygons. The numbers should go left to right top to bottom, starting at 1. I'm using ArcGIS Desktop with a Basic license, and would prefer to do this with ...
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0answers
112 views

QGIS - Label Rectangle/Buffer Overlapping Layer Above

When I apply a buffer or rectangle to my labels they show through the overlying layers. Is there any way to avoid this, i.e. arrange the label so it lies underneath the layers above? I'm assuming the ...
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1answer
85 views

What do the heatmap layer settings numbers in mapbox stands for?

I have layer settings of mapbox heatmap as follows from this official site: What do these numbers stand for (the first, the second, the third, the fourth number) and what are their limitations please?...
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1answer
1k views

Adding Properties to a feature in Google Earth Engine

Is there a way to add a property to a feature in the GEE. I know that you can edit existing properties with set(), but haven't found a way to add a property.
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1answer
62 views

ERDAS Imagine signature picker colour changing RGB numbers?

I've noticed something with the signature picker in ERDAS and I was wondering if it is a bug or a feature. When I create classes I assign a colour to make them easily readable in the classified ...
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2answers
42 views

Polygons from different layers

How to create a map with polygons from all the different layers? I'm using ArcGIS Pro and it does not have Overlay analysis tool.
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1answer
166 views

Republishing AGS Service Doesn't Update Web Map in AGOL

I created a web map in my AGOL content folder after publishing from ArcMap as a Portal feature service. I created a web map in AGOL by bringing in the service URL. I have three group layers with ...
2
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1answer
165 views

Selecting points within polygon using ArcGIS Desktop?

I am using ArcGIS Desktop for the first time in many years. I have a postal sector layer under a series of merged drive time boundaries. How do I select just those postal sectors which fit within ...
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1answer
54 views

Split layers by field QGIS version 3.2.3 [duplicate]

I want to split a vector layer based on values in a specific field. In older versions I could use the plugins 'LayersbyField' or 'Split Vector Layer', but both seem not to be available anymore in ...
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1answer
226 views

RuntimeError: Object: Error in executing tool when running Union

I have a list of a 2 layers (nfhl_fld_haz_features, prelim_fld_haz_features) and a feature class (master_merge) that I want to perform a union on: wkflw2_union = arcpy.Union_analysis([master_merge, ...
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1answer
89 views

Displaying WMS sublayers on ArcGIS JavaScript

I want to display layers of a WMS service containing sublayers on ArcGIS using JavaScript 3. No layers appear, but the WMSLayer is marked as loaded. the WMS is described here: data shom WMS My code ...
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1answer
27 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 ...
1
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1answer
287 views

Get child layers from a layer group

I'm using a geoserver and openlayers3 with html. I cannot find the way to obtain the child layers from a layer group. I have a layer group, and I show it in html perfectly, but what I want is to be ...
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1answer
62 views

Create an offline version of layers in ESRI WebGIS? [closed]

I am new with Online/WebGIS concept from ESRI and mostly worked on ArcMap 10.3 until now. We have recently created a WebGIS for one of our clients with a lot of vector layers which is pretty big data. ...
3
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1answer
397 views

Migration plugin from QGIS 2 to QGIS 3: list layers

I am trying to migrate a plugin from QGIS 2 to QGIS 3. This function doesn't work with QGIS 3 : def getLayersByKeyWord(keyword): #retourne une liste de layer res=[] layerMap = ...
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1answer
259 views

Openlayers only Popup for Marker but NOT for Polygon [duplicate]

I only want popups for the layer of the markers (icon), but not for the layer of the polygons (WFS). var defaultStyle_polygon_1 = new ol.style.Style({ fill: new ol.style.Fill({ ...
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3answers
1k views

Copy/Paste Layer with Attribute table to new Layer using ArcGIS Pro?

When I copy features from one layer in ArcGIS Pro to a blank layer, the polygons are transferred, but the attribute table behind those features is not transferred. To give a specific example, I ...
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1answer
58 views

Display legend of WMS in layers panel in full extent

When loading a WMS layer from e.g. http://www.wms.nrw.de/geobasis/wms_nw_dgk5 the legend of the layer with larger desciptions is displayed in the layer panel not to its full extent (see picture). When ...
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1answer
43 views

What Kind of Layer to Add Building Info? [closed]

I am new to QGIS (two days ago) and have been given a task to identify buildings, store info on them (building year, color, road type) in a layer and then export the info in a CSV file. I have fuddled ...
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2answers
404 views

Listing layers from .mxd file using ArcPy for ArcGIS Pro?

I am looking for a way to access a .mxd file's layer names and data sources. In ArcGIS Desktop, I could do: def print_layer_info(mxd_path): print(mxd_path + ":") mxd = arcpy.mapping....
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1answer
62 views

Automating removal of credits (citations) assigned to layer using ArcPy?

I have been given a map document with ~130 feature classes which have been symbolized, etc. In the layer properties, on the General Tab, credits have been written in. When published to ArcGIS Online ...
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0answers
34 views

OSM original and exported polygons don't match

I'm having trouble to understand why polygons from OSM after being both copied and exported to a different layer don't cover their originals. Blue are the new one, with black outline - the original ...
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1answer
36 views

Keep only endpoints of line with Extract Vertices

Using QGIS 3.2, I can use the "Extract Vertices" tool to generate a layer of vertices for each line segment in my data. My data is split into line segments of between 400-500m in length (using the v....
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1answer
29 views

Extracting non-duplicate features between layers in ArcGIS Desktop?

Just making an example: Layer B has 5 points. There's a layer(A) contains 10 points and 5 of which duplicate(totoally same and overlap) with layer B. How to output the other 5 non-duplicate points ...
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1answer
135 views

Different SVG markers for different attributes

I am using QGIS 3.0. I want to use different angle arc SVG markers depending on the data in the attribute table. For example, some points require a 60-degree marker, other a 35-degree marker etc. to ...
0
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1answer
222 views

Geoserver generated Geopackage not displaying in maps

We have a geoserver instance with Geotiff layers created as layers and mosaics. When I query the geoserver to getMap as a png or image it displays the correct map data. When I change the output ...
1
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1answer
338 views

Disappearing polygons when zooming in QGIS 3.0

I am using QGIS 3.0 and loaded a polygon layer from a shapefile containing more than 300,000 polygons. When zooming in some polygons are not drawn (not the entire layer).
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1answer
139 views

Show/hide layers (not sublayers) via selector in legend - carto.js v4

I am trying to build a layer selector using carts.js.v4, similar to the one provided in Carto Builder. Examples of layer selectors that I have found utilize sublayers and my maps are using separate ...
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1answer
51 views

Creating 2 symbology in the same layer on Mapinfo [closed]

New to MapInfo, I would like to create a High voltage layer with two different attributes (11 and 6.6) representing by two different colours on MapInfo. How can I do that?
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0answers
79 views

Changing URI source of WMS Raster Layer in place PyQGIS

In my Qgis Plugin, I manage a set of WMS layers that are secured by Api key. As I develop this plugin for differents clients who have different Api Key, I need to set the right Key when a specific ...
2
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3answers
122 views

Format .csv or .txt file so that the following stops happening?

I have a large dataset compiled of point data. Previously, this data was contained in 3 different files that all were successfully made into layers on QGIS, however I just combined them into one large ...
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0answers
100 views

Getting Bonn 3.2.2 registry error?

This is the error I am getting in QGIS Bonn 3.2.2: Traceback (most recent call last): File "/usr/lib/python3.6/code.py", line 91, in runcode exec(code, self.locals) File "<input>", ...
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1answer
990 views

How do you get a color topographic map in Google Earth using the altitude provided by the 3D models

Is there any way to get an accurate, high definition, color topographical map as an overlay in Google Earth? It would be somewhat similar to this image captured by NASA of the surface of the moon ...
2
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1answer
286 views

QGIS: Is it possible to merge two stacked raster layers keeping color rendering and transparency?

Extremely new to QGIS and was hoping to merge 2 layers and maintain an "overlay" keeping layer transparency and color rendering? I seem to loose the top layers layer properties when merging and it ...
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0answers
46 views

Add rasterlayer with defined symbology in ArcPy

I am trying to add a raster layer in ArcPy with arcpy.mapping.Layer(Raster). By default, the layer is added with "Stretched" symbology. However, for further use of the raster, I need "Unique Values" ...
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1answer
57 views

QGIS - Transfer feature selection with new attributes to PostGIS

I have three shapefiles which represent a conduit network with valves and hydrants. The pipe grid consists of line features in a shapefile and the valves and hydrant each are a point layer in a ...
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0answers
62 views

Show layer results in canvas for QGIS 3.0.2?

For both vector and raster layers, previously in QGIS 2 there was an option asking whether you want layers to be shown in the canvas ("show result in canvas"). Now in QGIS 3.0.2 "Girona" this option ...
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0answers
36 views

Setting COLORRANGE for rasters with variable minimum and maximum value in MapServer?

I have a series of rasters picturing the same phenomenon/product eg. the accumulated precipitation and I use the same mapfile for all. Naturally the minimum is always zero but maximum is variable from ...
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1answer
511 views

Creating layers depending on a property?

I have a .js file with coordinates for internships: var internships = [{ "features": [ {"type":"Feature","properties":{"category":"entretient","Name":"green"},"geometry":{"type":"Point","...
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1answer
111 views

Changing description of layer using ArcPy?

I would like to change the file description with a python code on ArcMap (10.6). I could not find a way to do it or resource explaining it. Do you have any idea?