0
votes
1answer
6 views

How to assign a XY coordinates into a bunch of points in Qgis

I have a bunch of points without XY coordinates and It is a global point dataset. This dataset is a 1*1 grid in a 400*800 dimension. It is quite obvious that each point has a specific XY coordinades, ...
0
votes
0answers
3 views

Hox to Extract node table from OSM for a specific country

What vrey simple way is it to get name and coordinate from OSM - by the past I got a table but am now unable to get it from a very basic method. I dont understand anything to all these script ...
0
votes
0answers
3 views

Excel data to a Raster Map

I am trying to create a radiometric map, I have x, y , z coordinates and a value in excel. I want to create a raster map based on this data. How do I go about doing this. I am using ArcGIS 10 with ...
0
votes
1answer
10 views

How to find if map layer registry is empty?

In my script I want to open layer named my_layer if it is in the map layer registry. I use following code for it: inputLayer = QgsMapLayerRegistry.instance().mapLayersByName("my_layer")[0] If not ...
0
votes
0answers
4 views

Map matching a stream of GPS points to possible bus routes & C# map matcher

I have streams of GPS points that are transmitted from a device aboard a bus in real time. I would like to use these points to infer which route the bus is following. I have routes stored as GPS point ...
2
votes
0answers
10 views

PyQgis: How to access a deleted features attributes (before committing)

I have a signal setup for a feature deletion event on a layer: self.layer.featureDeleted.connect(self.feature_deleted) When I try and grab an attribute from the deleted feature on the slot, a ...
3
votes
0answers
9 views

Problem with flow lines in ArcMap

As a part of my PhD I have to map the rivers of Northern Peloponnese, Greece. I have downloaded two DEMs from Nasa Reverb, which I connected with "mosaic to new raster". I have started the usual ...
0
votes
1answer
12 views

How to find the intersecting area using Arcobjects?

I created a polygon by buffering a polyline. I need to extract area value (Ex: WaterArea) intersecting the polygon. I tried the code below. It returns all the intersecting water area features. I need ...
0
votes
1answer
9 views

How to use locally served tiles for interactive maps instead of just a png image of tiles

Hi I followed this link and it worked for me.. https://switch2osm.org/serving-tiles/manually-building-a-tile-server-14-04/ I can serve tiles locally but running it and by just typing the link like ...
1
vote
0answers
8 views

How to scale SVG symbols which are not label background on zoom level in QGIS

I need to scale the SVG symbols on zoom level. @Underdarks answer in the posted question did not help me thus I can't set the SVG symbols as label background for I have labels which should not be ...
0
votes
0answers
9 views

Not able to see the WMS layers using openlayers 3.7.1. But no error and working with Openlayers 2

var layers = [ new ol.layer.Tile({ extent: [398272.97159758804,1282225.30161103,888994.299775119,2044464.66045665], preload: Infinity, visible: true, source: new ol.source.TileWMS({ ...
1
vote
0answers
6 views

TypeError raster object is not iterable when trying to normalize DEM

In ArcGIS 10.1 I'm trying to normalize a section of a DEM (digital elevation model) from original values to values ranging from 0 to 100. First I clipped the raster DEM with an irregulary shaped ...
1
vote
1answer
12 views

Polygons in one layer have different attributes

Is it possible in PyQGIS to have in one layer more polygons and some would have one set of attributes and another different? E.g. Polygon_1(name, size, average_age), Polygon_2(name, size, ...
-2
votes
0answers
8 views

Identifying features using ArcGIS Engine 10.1? [duplicate]

I am building a custom desktop GIS application in c# using arcgis engine 10.1 . I want to make a custom identify tool and add it to toolbar control. Any example or code will be helpfull.
0
votes
0answers
12 views

Processing large data sets in ArcGIS [duplicate]

I'm running ArcGIS on Amazon and I've started working with OSM. I was able to convert a small extract to a routable network data set so I decided it was time to go bigger. I'm going for a full CA ...
-3
votes
0answers
14 views

Implementing C# identify tool in toolbar using ArcGIS Engine?

Has anybody implemented "Identify Tool" in Toolbar control using C# (visual studio 2013) and ArcGIS Engine 10.1?
0
votes
2answers
11 views

Set a new SLD style in openlayers 3 for WMS request

I im triyng to submit a SLD style in openlayers 3 to change the color of my WMS(geoserver) But nothing is working...Anybody have a idea? Here is my code: var wms_p_popf = new ol.layer.Tile({ ...
1
vote
3answers
99 views

Free printable background map: land use, rivers, etc

I am looking for a free printable background map of europe which should look more or less like the OCM landscape: land use, major rivers, coast lines Is there any WMS or raster set whiche enables me ...
2
votes
1answer
15 views

How can I create a QGIS plugin that needs an external Python library?

I’m trying to enhance QGIS's Profiletool plugin by adding DXF export functionnality. For this, I need to to import dxfwrite library. As it's installed on my computer, i added the following lines to ...
0
votes
0answers
8 views

Normalized icon for BOYLAT

I try to find normalized icons to use for the BOYLAT ( lateral buoy ) I find description, but for the boylat it seems that different shape to show different buoy link for the description ...
1
vote
1answer
10 views

Rendering of SVG for layer symbols using QGIS?

I have a little problem with the rendering of SVG for layer symbol. I want to creeate a categorized symbol to show different style of buoy I have for that two icons the first is an half circle ...
0
votes
0answers
8 views

How to get data for a state which covers data regarding building roof tops? [on hold]

I am new to GIS , but I am looking forward to somehow capture the data for a particular state which also has the building's roof top data.
0
votes
1answer
12 views

A sum of rasters in ArcMap

I have daily SO2 data (the worldwide data) and after some processing I have to sum 30 rasters. What the tool can you recommend to use for this goal within ArcMap tools? I tried Raster calculator ...
0
votes
0answers
5 views

how to define threshold value in r.stream.extract

I want to generate streams using r.stream.extract. on what basis we have to define the threshold value. I am using aster dem with 30m posting.Also i want to know the minimum stream length to be ...
1
vote
1answer
12 views

Masking of DEM in ArcGIS Desktop?

I have a clipped DEM of my study area in ArcGIS Desktop 9.3 which I want to use for SWAT project set-up, but I need to mask it. How do I go about it? I'm new to the use of ArcGIS. I don't want to ...
1
vote
0answers
16 views

Why do pixel (cell) values change for 32 real NDVI values when taking from Multispec to QGIS?

Landsat 5 values change from normal NDVI -1 to 1 when created in Multispec as a 32 bit signed data image. When adding the raster layer in QGIS, the value range changed to 0-255. How does one ...
0
votes
0answers
11 views

Quantifying amount of sunlight falling in a region

I am trying to objectively quantify or provide some form of indication that could point toward the amount of sunlight or solar radiation onto a DEM over a day. In my limited knowledge, the way I could ...
1
vote
1answer
13 views

Opening MapInfo .TAB file containing text objects in QGIS?

Whenever I try to open a MapInfo .TAB file that contains text objects in QGIS, the text objects are converted to point objects. Any help, please?
0
votes
1answer
17 views

Split a shape file of lines into even spaced segments

I am using ArcGIS ArcMap 10.2. I have a shapeless of polylines and want to split them each line into 100 m segments. I can see under the editor toolbar the split tool and that can divide each line ...
1
vote
1answer
21 views

How to get PostGIS DB name from QGIS layer?

I'm writing a custom Processing script that needs to know which database connection a vector layer resides in. I can't find anywhere in the API a function to return this information from a layer. So I ...
2
votes
1answer
24 views

Find Intersection of Two Circle given Lat/Lon and radius

I am attempting to calculate the intersection of two circle on the Earth with a given latitude, longitude and radius. I started with this post. These circle will never be more than 100 km in diameter ...
1
vote
3answers
33 views

Grass toolbar for QGIS 2.10

I don't see the GRASS toolbar in QGIS 2.10 (Pisa). There are still GRASS commands in the Processing toolbox. I know there was some upgrade of GRASS for 2.10. Is the toolbar not available anymore? If ...
1
vote
1answer
36 views

Loading Natural Earth *.prj file into QGIS 2.10.1?

I have found solutions for this problem in other versions of QGIS, but none that apply to the newest version 2.10.1. Whenever I try to import a Natural Earth Raster projection that is a prj file I get ...
2
votes
0answers
18 views

QGIS.How to load a style from POSTGIS in PyQt

The thing is that I have four styles I have created in QGIS trough the GUI and saved into a postgresql database. I can see them in the table named layer_styles I have seen similar questions asking ...
3
votes
0answers
32 views

Importing analytical data (CSV) with different data types into ArcGIS Desktop to generate concentration heat maps?

After reviewing all the possible related solutions to my problem, I could not piece together a solution to process and import multiple sets of groundwater analytical data that contains different data ...
1
vote
0answers
10 views

Web map linked to database that shows one spatial location at a time

I have a simple database with a record for each research project that occured on a national forest. Each project area is associated with a polygon, and there are around 200 polygons that are piled ...
1
vote
1answer
27 views

How do I convert WGS84 to Lat, Long to Google Maps in R?

I have this coordinate which I believe it's in WGS84 format x=1005740.867110, y=243957.356623 I want to plot that in Google Maps which I need to convert that to Lon, Lat. I've found this script ...
2
votes
2answers
15 views

Editing Road Style/Color from ArcGIS Maps and Data Group

I have ArcMap 10.2 on a Windows 10 pc. I uploaded this open source layer into my desktop map, but I can't edit the look of the streets or color from the table of contents. Is there a way to do this, ...
0
votes
1answer
24 views

Global roads information prefrably with traffic volume

Im looking for a high quality global roads database. The only constraints I have is that it should be completely open (even foe commercial use) I have looked into some publicly available databases ...
0
votes
0answers
6 views

In jgrasstools kriging, what is the variogram model used when defaultVariogramMode = 0?

In jgrasstools 0.78, what are the variogram models corresponding to the values 0 and 1 of the defaultVariogramMode field? For mode 1, it seems to be a Gaussian variogram, by looking at the source. ...
1
vote
1answer
10 views

Donut polygons getting filled when exporting to 3d Web Scene

I have built a model using ArcScene by draping 2D polygon data over an elevation raster and am having issues when using the Export to 3D Web Scene tool. The tool builds the model successfully, but ...
0
votes
1answer
8 views

How to Reference a specific layer in a WMS Feed

I am looking to access HRDPS.CONTINENTAL - Air temperature (°C) to use in an ArcGISOnline Map from the WMS Feed http://geo.weather.gc.ca/geomet/?lang=E&service=WMS&request=GetCapabilities ...
1
vote
1answer
15 views

Is there a way to automatically find errors made by the Watershed tool?

I've delineated the watershed of near 7000 reservoirs with the Watershed tool in ArcGIS 10.1 and converted them in polygons. As you can see in the image bellow, some mistakes were made because the ...
0
votes
0answers
7 views

OpenLayers 3.7 New Server Vector WFS with GeoServer

I have recently updated from OpenLayers 3.0 to 3.7 and I noticed in the 3.5 update the Vector API has changed, I tried to alter the code as per the bottom section of code but i am getting the error ...
1
vote
0answers
10 views

Leaflet Markercluster and Timeline in sync

So I have been trying to figure how to use the markercluster and timeline plug in in sync to show a temporal animation of points. As some of the point data overlaps a cluster is needed to be able to ...
2
votes
1answer
37 views

Loop through columns Python arcpy.ListFields

I am trying to run a Python script that loops through all fields in my input feature attribute table. I have searched extensively and tried to use arcpy.ListField to work but it seems all people got ...
1
vote
2answers
20 views

How to put a frame around a legend using QgsComposerLegend?

I can already see this being a simple answer but I'm stumped with this. I want to create a frame around a legend created by a PyQGIS script Code snippet is: legend = QgsComposerLegend(c) ...
0
votes
0answers
33 views

migrating from arcgis server to open source gis technologies [on hold]

I am migrating from ArcGIS server backend to open source technologies. I have about 100 map services (~300 GB data) each with 100+ layers. I also have a web application where the user has to have a ...
2
votes
1answer
19 views

Why does the resolution decrease with increasing incidence angle in the Sentinel-1 SAR sattelite

On this link (Sentinel1 webpage for a SLC product), the resolution is written as a range from the highest corresponding to low incidence angle, to the lowest resolution corresponding to high incidence ...
1
vote
1answer
21 views

How can I check in QGIS python if an atrribute is included in my layer?

I use the following code: for field in self.layer.pendingFields(): if field.name()=='elevation': do this else: do that Although there is an elevation attribute in my layer ...

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