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What would be the process for drawing zoning setback lines for a property parcel polygon? I'm looking for a software agnostic solution - just a walk through of the general steps with enough detail that it could be done on a whiteboard. In the U.S., zoning regulations typically define a...

A new ArcGIS Online configurable app was released in July 2015 that provides an updated experience for sharing time-enabled maps. The Time Aware app looks and works great on its own, but it also provides a way to add time-enabled maps to your Story Maps. Read on to find out how to create a Time...

I want to edit a vector layer(its a point layer) using OpenLayers 3.6 and then save it with wfs protocol. My server is geoserver. I define my layer as follow: var u="http://localhost:8080/geoserver/wfs?&service=wfs&version=1.1.0&request=GetFeature&typeNames=opengeo:Point";format = new...

I cannot write a script using ArcPy (Click to toggle selectable). To make a layer unavailable for sampling! أكثر...

I have an ArcGIS geodatabase that contains one origin feature class linked to multiple standalone tables by Simple one-to-many Relationship Classes. The foreign keys in the destination tables are all nullable, deliberately, in order to allow shapes in the origin feature class to be edited...

The picture below shows that the order of attribute record for point features is different to their actually distributed location. How can I change or sort the attribute records into a proper order by using Python for ArcGIS? There also a line under the point features. أكثر...

Recently, just for fun, I have been examining innovative grid offerings from What3Words, MapCode (TomTom-link) and Open Location Code (Google). What3Words seems to have caught the most attention, and in this blog I will present my thoughts about this specific effort at creating a more useful map...

I've recently come across the semicircle unit that is used to describe a latitude and longitude using the maximum precision allowed by a 32-bit number. The conversion here is given as degrees = semicircles * ( 180 / 2^31 ), semicircles = degrees * ( 2^31 / 180 ). However it doesn't explain if...

I'm working with a 3D model of the earth (WGS84). The input to my problem is a geocentric lat-long. Is there an efficient way to convert this to a geodetic lat-long? My initial attempt to solve this seems to work correctly: First, convert the geocentric lat-long back to it's corresponding...

I'm trying to find the closest point in a line from an insertion point closest to it. To do it, in the middle of the function I use select id from rede_viaria.t_rviaria_via vias where st_intersects(st_closestpoint(vias.the_geom, (st_transform(ST_GeomFromEWKT('SRID=3857;POINT(-922235.81565421...

I would like to create a button "draw a hole" taht uses by default the holeModifier functionality but the user dont need to press the cttrlBtn. The "standard" way I guess, would be to create a way of create holes in OpenLayers would be something like this: var drawPolygon = new...

The 2015 season could be severe in Lake Erie and surrounding waters. أكثر...

A wildfire in north-central Washington state led to evacuations in a nearby village, and to closures along the Pacific Crest Trail. أكثر...

migrating from arcgis server to open source technologies --> what mapserver and tiles 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 layer...

This is my coding I used in Leaflet: var pointA = new L.LatLng(28.635308, 77.22496); var pointB = new L.LatLng(28.984461, 77.70641); var pointList = [pointA, pointB]; var firstpolyline = new L.Polyline(pointList { color: 'red', weight: 3, opacity: 0.5 smoothFactor: 1...

I am trying to batch import or convert .rbin files to .shp files. Right now the only way I've found to do this is by using the software's Rbin viewer. This viewer will let me export one .rbin file to a .shp file at a time. Any ideas how to automate this process or speed it up? Thanks...

I'm having problems updating a Leaflet map from a click event on an anchor tag located within a Leaflet Control on the map. Chrome and Firefox on Mac seem to have identical problems, Safari is slightly better. I have made a Leaflet control that allows a user to filter markers on a map. When the...

I am completely a beginner in GRASS but I would like to use it to have the cumulative cost of moving between two polygons. More exactly, I would like to get the smallest cost from any point situated at the edge of one polygon (polygon A) to any point situated at the edge of another polygon...

The GeoJSON spec says "The default CRS is a geographic coordinate reference system, using the WGS84 datum, and with longitude and latitude units of decimal degrees". It doesn't say seem to specify what the units of elevation/altitude/z are for points. Is there a default unit of altitude for...

I am attempting to use python and arcpy to automate the creation of some standardized maps I need to export for feature classes from various projects. I have a set of points and I need to export a single map for each point in the feature class, showing only one point at a time. I can iterate...