1
vote
2answers
22 views

Negative OSM ID values - building polygons

The use case is simple: extract all the buildings from OSM via osm2pgsql. In the process, it seems other entities make it into the polygons list, such as "islands", only because they have the "...
1
vote
0answers
12 views

Deriving Stream-Velocity out of a DEM

I'm using Arc GIS Toolbox Hydrology...everything works fine. Moreover, it is possible to derive the potential stream velocity just out of the DEM? Informations about rainfall, infiltration, hydraulic ...
3
votes
1answer
20 views

raster::rasterize set wrong values with enclosed polygons

Similarly to this post rasterize (R package raster) fail to rasterize island polygons? the rasterize function in the raster package is giving me problems with enclosed polygons. In my case, some ...
1
vote
1answer
26 views

How to define season by month and average data

I have 10 year NDVI data i.e. two values per month. I would like to average values within a season e.g Season A (January, February and March) per year and plot a graph. y axis=average ndvi value, x ...
2
votes
1answer
33 views

ArcGIS Desktop 10.4 crashes when opening a 10.3 MXD

Freshly installed ArcGIS desktop v10.4 over v10.3 ArcMap crashes (sometimes) when opening a 10.3 MXD. I updated 2 machines from 10.3 to 10.4. One machine is crashing when trying to open the MXD's we ...
2
votes
1answer
23 views

Label every polygon in Geoserver multipolygon

I want to label all areas in a multipolygon in Geoserver using SLD. I have a map with two or three areas, but the label is only visible on the largest one. See attached images; the first image shows ...
1
vote
1answer
23 views

Proportional circles as function of value NOT range

I have two point layers, each containing one column of values. When using the graduated style in layer properties, the size of the points is relative to the total range of values within that layer . ...
1
vote
0answers
14 views

grass algorithm changes integer to fixed length

using grass v.clean in the graphical modeller it changes all integer values from the original file to int with length 9 Is this a standard behaviour? Can this be avoided? The details of the grass ...
0
votes
0answers
15 views

Modify symbology on newly created shapefile with arcpy

I'm new to using arcpy and I'm diving into the deep end. Using arcMap 10.2.2, I can create a shapefile thus: # create point shape file for buildings arcpy.CreateFeatureclass_management(myFolder, "...
2
votes
1answer
19 views

If keep resolution = False in gdalogr:cliprasterbymasklayer

What does it mean if i put keep_resolution = False in gdalogr:cliprasterbymasklayer? In the tool itself in QGIS I could choose then a resolution which I want to have for the output, but here via ...
0
votes
1answer
11 views

Using cursors to summarize per group

I want to summarize fields per Group with python and need help to get unstuck. I'm trying to get the code below to produce a Dictionary of Groups and their total shape areas, like {'Group1':123456, '...
1
vote
0answers
24 views

Is there a Python equivalent to QGIS Raster Calculator's “file1.asc” AND “file2.asc”

I would like to script a calculation equivalent to QGIS Raster Calculator's "file1.asc" AND "file2.asc". I have 18 data raster files which I would like to do the equivalent of ADD to each of five ...
0
votes
0answers
11 views

Clustering across layers

I know how to create clustering inside one layer. It works fine. But is there any way to create clustering across different layers that e.g. points from different layers be not one on each other? ...
0
votes
0answers
6 views

Qgis Server error while loading wms layer in qgis

I have created qgis server by following link http://hub.qgis.org/projects/quantum-gis/wiki/QGIS_Server_Tutorial and http://docs.qgis.org/testing/en/docs/user_manual/working_with_ogc/...
2
votes
0answers
16 views

Connecting QGIS 2.14.3 to SQL 2012 both on LocalHost or Remote

I am working on establishing MSSQL (2012) spatial connection from my QGIS 2.14.3, its giving me an error like: (Error opening connection: [Microsoft][SQL Server Native Client 11.0]Named Pipes ...
0
votes
1answer
21 views

how to create a grid - create a line of points - in ArcGIS 10.2

I would like to create a line of points spaced at 1km intervals along each of the four edges of my DEM, I was wondering whether there is a way to do this automatically in ArcGIS 10.2 and if so, how ...
2
votes
2answers
29 views

Changing color of pin icon marker on CartoDB?

I am interested to use the pin icon (see attached image) in my cartodb map (cluster type). Can someone tell me how do I change the color of the pin to reflect categorical data? I tried to click img ...
1
vote
1answer
42 views

Assign row object as field name in ArcGIS

Is there a specific way to assign the object that for example row[0] returns in a SearchCursor to a new field name? I mean how to write it in add field syntax, this doesn't work: arcpy....
0
votes
0answers
23 views

Changing add vertex snap distance in ArcMap?

Editing polygons from with ArcMap 10.2.2, whilst using the add vertex tool: Is it possible to adjust the snap distance to which the tool selects a previous established vertex rather than creating a ...
0
votes
0answers
42 views

Preventing North Arrow from jumping around in ArcPy?

I am using a python script, which opens an mxd, loads a feature class, exports the map to a png. That script produces a few hundreds of maps. After my update to 10.4 (maybe that is a coincidence) the ...
2
votes
1answer
33 views

Converting UTM coordinates to WGS 84

I know the coordinates below are in UTM 36N (due to the EPSG code), and I can convert them with several websites online to wgs 84 and see them in Google Maps. However, been helplessly looking the ...
-1
votes
0answers
18 views

Add QML file to other computers- QGIS 2.12

I create symbol mark and saved it in QML file. When I tried to use it on another computer it doesn't work and i get "?" sign:
1
vote
0answers
16 views

Leaflet map with 'query of features' on mouseover and multiple layers

I have produced two working Leaflet maps that in total contain the features that I need for my application. However, I cannot solve how to have multiple 'overlay' layers that can be queried with ...
2
votes
3answers
85 views

No Module named qgis

I installed QGIS through OSGeo4W, and I am trying to write a standalone PyQGIS script, however, I am unable to import the qgis, qgis.core, processing ect… modules, as shown in the picture, I get the ‘...
0
votes
0answers
7 views

Extract median slope percentage for a specific plot of land

I'm completely new to GIS, but I have a possible upcoming project that requires tools for assisting people assessing the bushfire safety of specific private and commercial properties. One of the ...
1
vote
0answers
14 views

HCS geo HMS slope calculation issue

I am using slope function from geoHMS Toolkit in arcMap 10.3. After the execution of the function the river attribute table is showing 0 in all the fields of slope,ElevUP and Elev down. I am ...
1
vote
0answers
14 views

Changing colors in SVG file polygon using QGIS?

I try to change colors and lines width in this polygon (this is SVG file): I learn from here SVG symbol colors differences in QGIS 2.12? Using SVG file to fill polygon using QGIS- problem to add ...
2
votes
0answers
4 views

Mapquest - Distance Matrix presist Data

I am in need for a Distance matrix(driving directions) for multiple locations ~1000 for a web application i am building. The allToall attribute is what i am looking at in the Mapquest API http://www....
1
vote
0answers
16 views

Slope analysis on Terrain data using WhiteBox GAT?

How do I find out the Slope of "best fit to the sectoral terrain" using WhiteBox GAT? here is in details about the area of calculation. we have a reference point, from the reference point our ...
2
votes
1answer
36 views

Creating a Line at a Length and Angle in WGS84 - Arcobjects

I need to draw a line at desired length(around 10-20 Km length) and a user entered angle. The map/data uses WGS84 coordinate system. So the measurement is geodesic. Here are the methods that I tried. ...
0
votes
1answer
9 views

how do I map from a mapbox map or tile to the lat lon extents of the map?

A web app I use displays map tiles from mapbox and then uses leaflet to overlay that map with an svg path representing a route. The problem is that the area given to the map is very tiny, it's short ...
0
votes
0answers
19 views

Removing cloud coverage from thermal images? [on hold]

My undergraduate group will be sending a CubeSat to space to take thermal images to measure urban heat island. We have been trying to research software to remove clouds from these images but have ...
2
votes
2answers
52 views

Assign nearest raster cell value to point

I came across to a similar issue described in Finding nearest raster cell value based on vector point? I understand the proposed solution with Raster to Point and then Spatial Join with (for example) ...
0
votes
1answer
51 views

Shortening code to work with multiple workspaces in ArcPy?

I need advice on how to reduce the length of the sample code below. I need to perform the same work on several more datasets. import arcpy, os arcpy.env.workspace = r"\\gis\Env.gdb\Water" datasets =...
2
votes
1answer
9 views

ArcGIS Online: Time-Aware App only takes time-related input?

I've been trying to use a dataset for the Time-Aware app on AGOL, but instead of using the year of a data point's collection, I'm trying to use the sequential order number (integer 1-10) of each layer....
0
votes
0answers
18 views

Exporting georeferenced PDF map [duplicate]

I am used to working with ArcMap but have been playing around with QGIS. When I export a PDF map with ArcMap, the PDF is spatially referenced. This is a handy tool, I can put the PDF map on my iPhone, ...
0
votes
0answers
17 views

Trouble adding and populating field on the fly in ESRI feature layer

I'm trying to build a mashup consisting of a Census tiger web feature layer, and some JSON. I want to make a map of the feature layer, then add a new field to the layer, and populate from the JSON. ...
1
vote
0answers
9 views

Converting Geo-normalized SVG data to geojson

I'm working on a project for which our team geonormalized some TIFF files with MapWarper, then used photoshop to vectorize only the buildings within the images. We now have svg data for which we know ...
1
vote
1answer
17 views

Styling multiple features in shapefile using GeoServer?

I have a shapefile loaded in a GeoServer instance, and I need some guidance on how to best style the output. The file is depicting public/private land ownership in the State of Colorado. The shapefile ...
2
votes
0answers
14 views

Determining resolution of specific image in PDF document?

Can GDAL be used to determine the resolution of an image embedded inside a PDF? If not GDAL, is there another method? I'm using gdal_translate to convert TIF+TFW files into geospatial PDF. I know ...
2
votes
0answers
17 views

Working with intersecting polar grids

I'm having some trouble figuring out the best way handle some GIS data. I want to analyze pollution from specific sites at specific points. I have a list of sites I'm interested in all across the ...
2
votes
0answers
10 views

Converting to Parcel Fabric - Extra lines, verticies, and the clean up process

I am currently taking my first stab at trying to convert our City's parcel layer into a parcel fabric. From what I understand, our DWG is converted to vector and ArcGIS processes. It does not come ...
2
votes
0answers
13 views

Cutline mosaicing areal imagery with open source software

I'm very new in gis, and i'm trying to find a fast solution to merge 200 historical areal images(black and white from 1944). I orthorectified them manually, using gcp-s. They have 1 to 10 meters error....
-4
votes
1answer
31 views

assigning a label to a variable

I am getting a traceback error at the for loop (line 9). TypeError: #'NoneType' object is not iterable I was wondering if fcList is empty. I also thought leaving arcpy.ListFeatureClasses() ...
2
votes
1answer
22 views

Using dynamic property value in OnlineResource href against MongoDB store?

I am passing this SLD to geoserver: <?xml version="1.0" encoding="UTF-8"?> <StyledLayerDescriptor xmlns="http://www.opengis.net/sld" xmlns:ogc="http://www.opengis.net/ogc" xmlns:xlink="http:/...
2
votes
0answers
11 views

Selecting rows of attributed relationship class (intermediate table) using relate table function

I have 2 classes: Owners Properties And 1 relation class (M-N) attributted Like this example "http://webhelp.esri.com/arcgisdesktop/9.2/tutorials/EditingRelationships_4.htm" In this link, in ...
1
vote
1answer
14 views

How to I replace pixel values in a single band DEM?

I have a single band DEM tif. And would like to replace values above or below a certain threshold with 0. Can I do that with GDAL?
1
vote
0answers
10 views

How to fix a time error when exporting data

I frequently have to export data from a layer in ArcGIS online (that is created from Arc Collector offsite) to excel via CSV format. One of the fields is the CreationDate field that is automatically ...
1
vote
1answer
15 views

How do you provide a magnified view within layout view?

I want to label each land parcel and realize some groups of parcels are too small and close together to label effectively. Therefore, I want to create a magnified view to include on the sheet for this ...
4
votes
1answer
81 views

SVG markers made in InkScape appear transparent in QGIS

Using QGIS 2.14.3 on Ubuntu 16.04, I created a custom icon using inkscape for QGIS. You can find it here (Update: that icon is now fixed). In inkscape, in my filesystem, it displays as: However in ...

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