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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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25 views

How can I overlay an image (exported via ArcGIS API) on an OpenStreetMap map?

Before I attempt to explain my situation, I'd like to disclose I'm very new to these apps and GIS in general. There's a public ArgGIS server that I'd like to export a layer from and overlay on an ...
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0answers
6 views

Setting raster visibility on/off in QGIS Python API 3

I'm having a bit of a trouble migrating an algorithm from pyqgis 2 to pyqgis 3. The thing is I want to make visible and invisible a series of layers as I iterate through a list and render some images. ...
3
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0answers
37 views

Fixed QGIS layer symbol size in layer legend

When a layer symbol is defined with map units or "meters at scale" unit, it is sometimes shown in the legend at a very small scale, preventing to see the details. Or if we zoom in the map, the legend ...
2
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0answers
22 views

Showing split polygons in different layers in QGIS

I used the split feature to split a polygon into two parts. Is it possible to show the split parts in sub-layers in the layers panel, so that I can hide them individually? I am using QGIS 3.
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0answers
11 views

Finding land that has certain parameters for reforestation efforts that will be used for carbon credits? [closed]

I recently completed a GIS certificate from UC Davis and am now doing some freelance work for a friend. He is looking to purchase land (anywhere) to plant trees on (reforestation). Ideally we would ...
0
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1answer
32 views

GQGIS 3.2 Join Attributes from Layer Limitation?

I want to join two txt tables as a layer in QGis 3.2. In eralier versions (2.12) works to join one of the tabel more times to the other table. Now in the version 3.2 i can join only one time. The ...
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0answers
38 views

Selecting WMS layers from GeoServer in OpenLayers application?

I am making a weather application and I am almost there! I can show my GeoServer WMS-layers in my browser using OpenLayers 5. What I want to accomplish is that the user can switch between different ...
4
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1answer
60 views

Store human readable layer name in QGIS style files?

QGIS 2 and 3 as well seem not to store the Layer name (set via Layer Properties | Source | Settings | Layer name or via 'Rename' in the layers context menu) in styles files. I.e. if i have a PostGIS ...
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1answer
25 views

Getting TypeError: <type 'str'> from arcpy.mapping.ListLayers()?

I want to do simple task, using arcpy to turn on the label, I use this code (I'm googling it and change the path with my own mxd path) but it failed and returns an error. import arcpy mxd = arcpy....
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1answer
25 views

Renaming layer in multiple maps in ArcGIS Pro with ArcPy?

Running ArcGIS Pro 2.2, I have a layer in ~20 maps that needs it's name changed. I pulled this code together from a bunch of snippets, and have done my best to make sure it's updated appropriately, ...
2
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1answer
25 views

Creating Drop Down List of Layers for ModelBuilder Tool?

In ModelBuilder I require the user select 1 of 5 feature class layers as the initial feature class to run the rest of the model on. The selected layer is to be then fed into a clipping tool as the ...
4
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2answers
106 views

Allowing all QGIS workspace layers to be editable at once

I stumbled upon an odd behaviour of layers in QGIS 3.4 brought from PostGIS. The first layers I brought to the project are always editable together when clicking the Toggle Edit-button, but some of ...
0
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1answer
17 views

Retreiving Layer Files From Map Packages

I have around 57 map packages that I need to salvage layer data from. The layer files were incorrectly saved with absolute paths instead of relative paths so they won't display unless they are opened ...
1
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1answer
23 views

Selecting Specific Entities to Style Separately from the Same Layer in QGIS 3.2.4

I downloaded the roads of Rome from OSM and save them as a single Shapefile. To style specific entities from the "highway" column I categorized this column in the layer styling panel. Now I got all ...
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0answers
40 views

Filling Polygon with SVG File so it Will Appear Only One Time in QGIS 3.4.2

I have a layer that shows the world, without Antarctica and small islands. This layer is made of five different polygons. I want to fill it with an SVG file that is displayed non uniform background. ...
5
votes
2answers
173 views

A Fast Way to Color Polygon With 200 Row With Six Selected Color in QGIS 3.4.2

I have a layer of the world that contains 200 rows. I am required to color the map with six selected colors, the rainbow colors. I figure that I can save selected countries and save them separately....
1
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1answer
63 views

Add point markers in QGIS 3.4 without coordinates

I am new to QGIS and trying to insert svg markers into a map I've been creating. I am struggling to find resources on my exact problem. I read about creating a new georeferenced shapefile and layering ...
1
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1answer
27 views

Printing name of each layer in mxd using ArcPy?

My ArcMap verison is 10.2. My goal is to print the name of each layer in a mxd using Arcpy. My script is below. There is no error, but it prints the first layer multiple times instead of all the ...
3
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0answers
32 views

How to view layers by data source in QGIS 3?

Is there a tool or panel in QGIS 3 that allows a user to view the map layers by data source? Similar to the List By Source view in the ArcMap Table of Contents? I thought I had come across it, but ...
0
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0answers
20 views

Using Datasets in OSM Metadata Within QGIS?

I was looking into ways of using the OSM database within QGIS. I opened the "OSM Standard" and choose the "Biota" category from the ISO categories. However, after I choose this dataset it looks like ...
0
votes
1answer
33 views

Run model from script

This is my script where I am trying to use selectby_attribute within a model, based on a field, F*. There are 6 fields, so I want 6 derived layers. Then I am going to use bearing and distance tool ...
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3answers
77 views

Getting the layer styles out of a *.QGS without having the layers itselves

Is it possible, to restore the layer-styles from a *.QGS project file? I have unhandled layers in my project. As I'm starting the project, QGIS is asking me for the source of the layers but I don't ...
3
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0answers
25 views

How to render features that are just outside the map canvas extent in QGIS 3.4?

I am trying to generate a cloudy mask, following the recipe in "Qgis Map Design 2nd ed. Edition". For the most part, I have it working. But when panning around, the mask changes. And I think that ...
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0answers
30 views

Exporting maps individually as PDF files from each layer in ArcGIS Desktop?

I am working with a database which consists 15 neighborhood and each neighborhood has 11 different maps. On layout page everything is ready now but I am wondering if there is an easier/faster way to ...
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0answers
24 views

How to make a QGIS 3 Layer refresh after a joined data source is updated

I have a layer of ZCTA features that is sourced from a SpatiaLite table that is joined to an Excel spreadsheet and rendered with categorized symbology. That all works fine. The join configuration is: ...
0
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1answer
28 views

Using annotation Layer in QGIS?

I'm a bit of GIS rookie but I seem to have found my way around most of the intermediate functions of QGIS that I need for my work over the last year or so. What I want is really simple, but multiple ...
1
vote
1answer
32 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 ...
1
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1answer
50 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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votes
0answers
12 views

Update multiple layer file source paths and metadata xmls with arcpy

I have a directory holding multiple layer files with sources in an associated SDE as Feature Classes. I am attempting to, for each of the layers in my directory, change the layer's source path from ...
-1
votes
0answers
20 views

Peculiar layer visibility problem

I have created a set of layers in a group consisting of the border outlines of seven western states in the US. These are collected in a group. They are - or should be - "above" a raster of shaded ...
0
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2answers
62 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 ...
0
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1answer
30 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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0answers
151 views

ArcMap 10.6 crashing on Windows 10?

I recently received a new PC at work and went through the steps to install ArcMap. Their latest version offered is 10.6, which was on my previous PC and worked completely fine. The issue I am ...
2
votes
1answer
24 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
67 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 ...
1
vote
1answer
74 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 ...
0
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0answers
12 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 ...
2
votes
2answers
63 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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votes
2answers
36 views

Layers missing at project start-up

Does anyone know what is the problem?
3
votes
2answers
62 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 ...
2
votes
0answers
67 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 ...
0
votes
1answer
33 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?...
3
votes
1answer
97 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.
2
votes
1answer
13 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 ...
0
votes
0answers
37 views

QGIS 3.0 input layers for Python script [duplicate]

I have just updated from QGIS 2.18 to QGIS 3 (Madeira) and I want to run a self-written Python script. My Python script has two input-layers which I usually imported with the processing.GetObject('...
1
vote
2answers
38 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.
3
votes
1answer
51 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
votes
1answer
28 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 ...
0
votes
1answer
37 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 ...
0
votes
1answer
65 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, ...